PART 141-NATIONAL PRIMARY DRINKING WATER REGULATIONS
1. The authority citation for part 141 is revised to read as follows:
Authority: 42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4,
300g-5, 300g-6, 300j-4, 300j-9, and 300j-11.
2. Subpart O is added to read as follows:
Subpart O-Consumer Confidence Reports
Sec.
141.151 Purpose and applicability of this subpart.
141.152 Effective dates.
141.153 Content of the reports.
141.154 Required additional health information.
141.155 Report delivery and recordkeeping.
Appendix A to Subpart O--Converting MCL Compliance Values for Consumer Confidence Reports
Appendix B to Subpart O--Regulated Contaminants
Appendix C to Subpart O--Health Effects Language
Subpart O-Consumer Confidence Reports
§141.151 Purpose and applicability of this subpart.
(a) This subpart establishes the minimum requirements for the content of annual reports that community water systems must deliver to their customers. These reports must contain information on the quality of the water delivered by the systems and characterize the risks (if any) from exposure to contaminants detected in the drinking water in an accurate and understandable manner.
(b) Notwithstanding the provisions of §141.3, this subpart applies only to community water systems.
(c) For the purpose of this subpart, customers are defined as billing units or service connections to which water is delivered by a community water system.
(d) For the purpose of this subpart, detected means:
at or above the levels prescribed by §141.23(a)(4) for inorganic contaminants, at or above the levels prescribed by §141.24(f)(7) for the contaminants listed in §141.61(a), at or above the level prescribed by §141.24(h)(18) for the contaminants listed in §141.61(c), and at or above the levels prescribed by §141.25(c) for radioactive contaminants.
(e) A State that has primary enforcement responsibility may adopt by rule, after notice and comment, alternative requirements for the form and content of the reports. The alternative requirements must provide the same type and amount of information as required by §§141.153 and 141.154, and must be designed to achieve an equivalent level of public information and education as would be achieved under this subpart.
(f) For purpose of §§141.153 and 141.154 of this subpart, the term "primacy agency" refers to the State or tribal government entity that has jurisdiction over, and primary enforcement responsibility for, public water systems, even if that government does not have interim or final primary enforcement responsibility for this rule. Where the State or tribe does not have primary enforcement responsibility for public water systems, the term "primacy agency" refers to the appropriate EPA regional office.
§141.152 Effective dates.
(a) The regulations in this subpart shall take effect on [insert date 30 days after date of publication in the FEDERAL REGISTER].
(b) Each existing community water system must deliver its first report by [insert date 14 months after publication in the FEDERAL REGISTER], its second report by July 1, 2000, and subsequent reports by July 1 annually thereafter. The first report must contain data collected during, or prior to, calendar year 1998 as prescribed in §141.153(d)(3). Each report thereafter must contain data collected during, or prior to, the previous calendar year.
(c) A new community water system must deliver its first report by July 1 of the year after its first full calendar year in operation and annually thereafter.
(d) A community water system that sells water to another community water system must deliver the applicable information required in §141.153 to the buyer system: (i) no later than [insert date eight months after publication in the FEDERAL REGISTER], by April 1, 2000, and by April 1 annually thereafter or (ii) on a date mutually agreed upon by the seller and the purchaser, and specifically included in a contract between the parties.
§141.153 Content of the reports.
(a) Each community water system must provide to its customers an annual report that contains the information specified in this section and §141.154.
(b) Information on the source of the water delivered.
(1) Each report must identify the source(s) of the water delivered by the community water system by providing information on:
(i) The type of the water: e.g., surface water, ground water; and
(ii) The commonly used name (if any) and location of the body (or bodies) of water.
(2) If a source water assessment has been completed, the report must notify consumers of the availability of this information and the means to obtain it. In addition, systems are encouraged to highlight in the report significant sources of contamination in the source water area if they have readily available information. Where a system has received a source water assessment from the primacy agency, the report must include a brief summary of the system's susceptibility to potential sources of contamination, using language provided by the primacy agency or written by the operator.
(c) Definitions.
(1) Each report must include the following definitions:
(i) Maximum Contaminant Level Goal or MCLG: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
(ii) Maximum Contaminant Level or MCL: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
(2) A report for a community water system operating under a variance or an exemption issued under § 1415 or 1416 of SDWA must include the following definition: Variances and Exemptions: State or EPA permission not to meet an MCL or a treatment technique under certain conditions.
(3) A report which contains data on a contaminant for which EPA has set a treatment technique or an action level must include one or both of the following definitions as applicable:
(i) Treatment Technique: A required process intended to reduce the level of a contaminant in drinking water.
(ii) Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
(d) Information on Detected Contaminants.
(1) This sub-section specifies the requirements for information to be included in each report for contaminants subject to mandatory monitoring (except Cryptosporidium). It applies to:
(i) Contaminants subject to an MCL, action level, or treatment technique (regulated contaminants);
(ii)Contaminants for which monitoring is required by §141.40 (unregulated contaminants); and
(iii) Disinfection by-products or microbial contaminants for which monitoring is required by §§141.142 and 141.143, except as provided under paragraph (e)(1) of this section, and which are detected in the finished water.
(2) The data relating to these contaminants must be displayed in one table or in several adjacent tables. Any additional monitoring results which a community water system chooses to include in its report must be displayed separately.
(3) The data must be derived from data collected to comply with EPA and State monitoring and analytical requirements during calendar year 1998 for the first report and subsequent calendar years thereafter except that:
(i) Where a system is allowed to monitor for regulated contaminants less often than once a year, the table(s) must include the date and results of the most recent sampling and the report must include a brief statement indicating that the data presented in the report are from the most recent testing done in accordance with the regulations. No data older than 5 years need be included.
(ii) Results of monitoring in compliance with §§141.142 and 141.143 need only be included for 5 years from the date of last sample or until any of the detected contaminants becomes regulated and subject to routine monitoring requirements, whichever comes first.
(4) For detected regulated contaminants (listed in Appendix A to this subpart), the table(s) must contain:
(i) The MCL for that contaminant expressed as a number equal to or greater than 1.0 (as provided in Appendix A to this subpart);
(ii) The MCLG for that contaminant expressed in the same units as the MCL;
(iii) If there is no MCL for a detected contaminant, the table must indicate that there is a treatment technique, or specify the action level, applicable to that contaminant, and the report must include the definitions for treatment technique and/or action level, as appropriate, specified in paragraph(c)(3) of this section;
(iv) For contaminants subject to an MCL, except turbidity and total coliforms, the highest contaminant level used to determine compliance with an NPDWR and the range of detected levels, as follows:
(A) When compliance with the MCL is determined annually or less frequently: the highest detected level at any sampling point and the range of detected levels expressed in the same units as the MCL.
(B) When compliance with the MCL is determined by calculating a running annual average of all samples taken at a sampling point: the highest average of any of the sampling points and the range of all sampling points expressed in the same units as the MCL.
(C) When compliance with the MCL is determined on a system-wide basis by calculating a running annual average of all samples at all sampling points: the average and range of detection expressed in the same units as the MCL.
Note to paragraph (iv): When rounding of results to determine compliance with the MCL is allowed by the regulations, rounding should be done prior to multiplying the results by the factor listed in Appendix A of this subpart.
(v) For turbidity.
(A) When it is reported pursuant to §141.13: the highest average monthly value.
(B) When it is reported pursuant to the requirements of §141.71: the highest monthly value. The report should include an explanation of the reasons for measuring turbidity.
(C) When it is reported pursuant to §141.73: the highest single measurement and the lowest monthly percentage of samples meeting the turbidity limits specified in §141.73 for the filtration technology being used. The report should include an explanation of the reasons for measuring turbidity.
(vi) For lead and copper: the 90th percentile value of the most recent round of sampling and the number of sampling sites exceeding the action level.
(vii) For total coliform:
(A) The highest monthly number of positive samples for systems collecting fewer than 40 samples per month; or
(B) The highest monthly percentage of positive samples for systems collecting at least 40 samples per month.
(viii) For fecal coliform: the total number of positive samples.
(ix) The likely source(s) of detected contaminants to the best of the operator's knowledge. Specific information regarding contaminants may be available in sanitary surveys and source water assessments, and should be used when available to the operator. If the operator lacks specific information on the likely source, the report must include one or more of the typical sources for that contaminant listed in Appendix B to this subpart which are most applicable to the system.
(5) If a community water system distributes water to its customers from multiple hydraulically independent distribution systems that are fed by different raw water sources, the table should contain a separate column for each service area and the report should identify each separate distribution system. Alternatively, systems could produce separate reports tailored to include data for each service area.
(6) The table(s) must clearly identify any data indicating violations of MCLs or treatment techniques and the report must contain a clear and readily understandable explanation of the violation including: the length of the violation, the potential adverse health effects, and actions taken by the system to address the violation. To describe the potential health effects, the system must use the relevant language of Appendix C to this subpart.
(7) For detected unregulated contaminants for which monitoring is required (except Cryptosporidium), the table(s) must contain the average and range at which the contaminant was detected. The report may include a brief explanation of the reasons for monitoring for unregulated contaminants.
(e) Information on Cryptosporidium, radon, and other contaminants.
(1) If the system has performed any monitoring for Cryptosporidium, including monitoring performed to satisfy the requirements of §141.143, which indicates that Cryptosporidium may be present in the source water or the finished water, the report must include:
(i) A summary of the results of the monitoring; and
(ii) An explanation of the significance of the results.
(2) If the system has performed any monitoring for radon which indicates that radon may be present in the finished water, the report must include:
(i) The results of the monitoring; and
(ii) An explanation of the significance of the results.
(3) If the system has performed additional monitoring which indicates the presence of other contaminants in the finished water, EPA strongly encourages systems to report any results which may indicate a health concern. To determine if results may indicate a health concern, EPA recommends that systems find out if EPA has proposed an NPDWR or issued a health advisory for that contaminant by calling the Safe Drinking Water Hotline (800-426-4791). EPA considers detects above a proposed MCL or health advisory level to indicate possible health concerns. For such contaminants, EPA recommends that the report include:
(i) The results of the monitoring; and
(ii) An explanation of the significance of the results noting the existence of a health advisory or a proposed regulation.
(f) Compliance with NPDWR. In addition to the requirements of §141.153(d)(7), the report must note any violation that occurred during the year covered by the report of a requirement listed below, and include a clear and readily understandable explanation of the violation, any potential adverse health effects, and the steps the system has taken to correct the violation.
(1) Monitoring and reporting of compliance data;
(2) Filtration and disinfection prescribed by Subpart H of this part. For systems which have failed to install adequate filtration or disinfection equipment or processes, or have had a failure of such equipment or processes which constitutes a violation, the report must include the following language as part of the explanation of potential adverse health effects: Inadequately treated water may contain disease-causing organisms. These organisms include bacteria, viruses, and parasites which can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.
(3) Lead and copper control requirements prescribed by Subpart I of this part. For systems which fail to take one or more actions prescribed by §§141.80(d), 141.81, 141.82, 141.83 or 141.84, the report must include the applicable language of Appendix C to this subpart for lead, copper, or both.
(4) Treatment techniques for Acrylamide and Epichlorohydrin prescribed by Subpart K of this part. For systems which violate the requirements of Subpart K of this part, the report must include the relevant language from Appendix C to this subpart.
(5) Recordkeeping of compliance data.
(6) Special monitoring requirements prescribed by §§141.40 and 141.41; and
(7) Violation of the terms of a variance, an exemption, or an administrative or judicial order.
(g) Variances and Exemptions. If a system is operating under the terms of a variance or an exemption issued under §1415 or 1416 of SDWA, the report must contain:
(1) An explanation of the reasons for the variance or exemption;
(2) The date on which the variance or exemption was issued;
(3) A brief status report on the steps the system is taking to install treatment, find alternative sources of water, or otherwise comply with the terms and schedules of the variance or exemption; and
(4) A notice of any opportunity for public input in the review, or renewal, of the variance or exemption.
(h) Additional information. (1) The report must contain a brief explanation regarding contaminants which may reasonably be expected to be found in drinking water including bottled water. This explanation may include the language of paragraphs (h)(1)(i) through (iii) or systems may use their own comparable language. The report also must include the language of paragraph (h)(1)(iv) of this section.
(i) The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.
(ii) Contaminants that may be present in source water include:
(A) Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
(B) Inorganic contaminants, such as salts and metals, which can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.
(C) Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.
(D) Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems.
(E) Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.
(iii) In order to ensure that tap water is safe to drink, EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. FDA regulations establish limits for contaminants in bottled water which must provide the same protection for public health.
(iv) Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline (800-426-4791).
(2) The report must include the telephone number of the owner, operator, or designee of the community water system as a source of additional information concerning the report.
(3) In communities with a large proportion of non-English speaking residents, as determined by the Primacy Agency, the report must contain information in the appropriate language(s) regarding the importance of the report or contain a telephone number or address where such residents may contact the system to obtain a translated copy of the report or assistance in the appropriate language.
(4) The report must include information (e.g., time and place of regularly scheduled board meetings) about opportunities for public participation in decisions that may affect the quality of the water.
(5) The systems may include such additional information as they deem necessary for public education consistent with, and not detracting from, the purpose of the report.
§141.154 Required additional health information.
(a) All reports must prominently display the following language:
Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791).
(b) A system which detects arsenic at levels above 25 g/l, but below the MCL:
(i) Must include in its report a short informational statement about arsenic, using language such as: EPA is reviewing the drinking water standard for arsenic because of special concerns that it may not be stringent enough. Arsenic is a naturally-occurring mineral known to cause cancer in humans at high concentrations.
(ii) May write its own educational statement, but only in consultation with the Primacy Agency.
(c) A system which detects nitrate at levels above 5 mg/l, but below the MCL:
(i) Must include a short informational statement about the impacts of nitrate on children using language such as: Nitrate in drinking water at levels above 10 ppm is a health risk for infants of less than six months of age. High nitrate levels in drinking water can cause blue baby syndrome. Nitrate levels may rise quickly for short periods of time because of rainfall or agricultural activity. If you are caring for an infant you should ask advice from your health care provider.
(ii) May write its own educational statement, but only in consultation with the Primacy Agency.
(d) Systems which detect lead above the action level in more than 5%, but fewer that 10%, of homes sampled:
(i) Must include a short informational statement about the special impact of lead on children using language such as: Infants and young children are typically more vulnerable to lead in drinking water than the general population. It is possible that lead levels at your home may be higher than at other homes in the community as a result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your home's water, you may wish to have your water tested and flush your tap for 30 seconds to 2 minutes before using tap water. Additional information is available from the Safe Drinking Water Hotline (800-426-4791).
(ii) May write its own educational statement, but only in consultation with the Primacy Agency.
§141.155 Report delivery and recordkeeping.
(a) Except as provided in paragraph (g) of this section, each community water system must mail or otherwise directly deliver one copy of the report to each customer.
(b) The system must make a good faith effort to reach consumers who do not get water bills, using means recommended by the primacy agency. EPA expects that an adequate good faith effort will be tailored to the consumers who are served by the system but are not bill-paying customers, such as renters or workers. A good faith effort to reach consumers would include a mix of methods appropriate to the particular system such as: Posting the reports on the Internet; mailing to postal patrons in metropolitan areas; advertising the availability of the report in the news media; publication in a local newspaper; posting in public places such as cafeterias or lunch rooms of public buildings; delivery of multiple copies for distribution by single-biller customers such as apartment buildings or large private employers; delivery to community organizations.
(c) No later than the date the system is required to distribute the report to its customers, each community water system must mail a copy of the report to the primacy agency, followed within 3 months by a certification that the report has been distributed to customers, and that the information is correct and consistent with the compliance monitoring data previously submitted to the primacy agency.
(d) No later than the date the system is required to distribute the report to its customers, each community water system must deliver the report to any other agency or clearinghouse identified by the primacy agency.
(e) Each community water system must make its reports available to the public upon request.
(f) Each community water system serving 100,000 or more persons must post its current year's report to a publicly-accessible site on the Internet.
(g) The Governor of a State or his designee, or the Tribal Leader where the tribe has met the eligibility requirements contained in §142.72 for the purposes of waiving the mailing requirement, can waive the requirement of paragraph (a) of this section for community water systems serving fewer than 10,000 persons. In consultation with the tribal government, the Regional Administrator may waive the requirement of §141.155(a) in areas in Indian country where no tribe has been deemed eligible.
(1) Such systems must:
(i) Publish the reports in one or more local newspapers serving the area in which the system is located;
(ii) Inform the customers that the reports will not be mailed, either in the newspapers in which the reports are published or by other means approved by the State; and
(iii)Make the reports available to the public upon request.
(2) Systems serving 500 or fewer persons may forego the requirements of paragraphs (g)(1)(i) and (ii) of this section if they provide notice at least once per year to their customers by mail, door-to-door delivery or by posting in an appropriate location that the report is available upon request.
(h) Any system subject to this subpart must retain copies of its consumer confidence report for no less than 5 years.
Appendix A to Subpart O-Converting MCL Compliance Values for Consumer Confidence Reports
Key
AL=Action Level
MCL=Maximum Contaminant Level
MCLG=Maximum Contaminant Level Goal
MFL=million fibers per liter mrem/year=millirems per year (a measure of radiation absorbed by the body)
NTU=Nephelometric Turbidity Units
pCi/l=picocuries per liter (a measure of radioactivity)
ppm=parts per million, or milligrams per liter (mg/l)
ppb=parts per billion, or micrograms per liter (g/l)
ppt=parts per trillion, or nanograms per liter
ppq=parts per quadrillion, or picograms per liter
TT=Treatment Technique
|
Contaminant |
MCL in compliance units (mg/L) |
multiply by... |
MCL in CCR units |
MCLG in CCR units |
|
Microbiological Contaminants | ||||
|
1. Total Coliform Bacteria |
- |
- |
presence of coliform bacteria in 5% of monthly samples |
0 |
|
1. Fecal coliform and E. coli |
- |
- |
a routine sample and a repeat sample are total coliform positive, and one is also fecal coliform or E. coli positive |
0 |
|
1. Turbidity |
- |
- |
TT (NTU) |
n/a |
|
Radioactive Contaminants | ||||
|
1. Beta/photon emitters |
4 mrem/yr |
- |
4 mrem/yr |
0 |
|
1. Alpha emitters |
15 pCi/l |
- |
15 pCi/l |
0 |
|
1. Combined radium |
5 pCi/l |
- |
5 pCi/l |
0 |
|
Inorganic Contaminants | ||||
|
1. Antimony |
.006 |
1000 |
6 ppb |
6 |
|
1. Arsenic |
.05 |
1000 |
50 ppb |
n/a |
|
1. Asbestos |
7 MFL |
- |
7 MFL |
7 |
|
1. Barium |
2 |
- |
2 ppm |
2 |
|
1. Beryllium |
.004 |
1000 |
4 ppb |
4 |
|
1. Cadmium |
.005 |
1000 |
5 ppb |
5 |
|
1. Chromium |
.1 |
1000 |
100 ppb |
100 |
|
1. Copper |
AL=1.3 |
- |
AL=1.3 ppm |
1.3 |
|
1. Cyanide |
.2 |
1000 |
200 ppb |
200 |
|
1. Fluoride |
4 |
- |
4 ppm |
4 |
|
1. Lead |
AL=.015 |
1000 |
AL=15 ppb |
0 |
|
1. Mercury (inorganic) |
.002 |
1000 |
2 ppb |
2 |
|
1. Nitrate (as Nitrogen) |
10 |
- |
10 ppm |
10 |
|
1. Nitrite (as Nitrogen) |
1 |
- |
1 ppm |
1 |
|
1. Selenium |
.05 |
1000 |
50 ppb |
50 |
|
1. Thallium |
.002 |
1000 |
2 ppb |
0.5 |
|
Synthetic Organic Contaminants including Pesticides and Herbicides | ||||
|
1. 2,4-D |
.07 |
1000 |
70 ppb |
70 |
|
1. 2,4,5-TP [Silvex] |
.05 |
1000 |
50 ppb |
50 |
|
1. Acrylamide |
- |
- |
TT |
0 |
|
1. Alachlor |
.002 |
1000 |
2 ppb |
0 |
|
1. Atrazine |
.003 |
1000 |
3 ppb |
3 |
|
1. Benzo(a)pyrene [PAH] |
.0002 |
1,000,000 |
200 ppt |
0 |
|
1. Carbofuran |
.04 |
1000 |
40 ppb |
40 |
|
1. Chlordane |
.002 |
1000 |
2 ppb |
0 |
|
1. Dalapon |
.2 |
1000 |
200 ppb |
200 |
|
1. Di(2-ethylhexyl)adipate |
.4 |
1000 |
400 ppb |
400 |
|
1. Di(2-ethylhexyl) phthalate |
.006 |
1000 |
6 ppb |
0 |
|
1. Dibromochloropropane |
.0002 |
1,000,000 |
200 ppt |
0 |
|
1. Dinoseb |
.007 |
1000 |
7 ppb |
7 |
|
1. Diquat |
.02 |
1000 |
20 ppb |
20 |
|
1. Dioxin [2,3,7,8-TCDD] |
.00000003 |
1,000,000,000 |
30 ppq |
0 |
|
1. Endothall |
.1 |
1000 |
100 ppb |
100 |
|
1. Endrin |
.002 |
1000 |
2 ppb |
2 |
|
1. Epichlorohydrin |
- |
- |
TT |
0 |
|
1. Ethylene dibromide |
.00005 |
1,000,000 |
50 ppt |
0 |
|
1. Glyphosate |
.7 |
1000 |
700 ppb |
700 |
|
1. Heptachlor |
.0004 |
1,000,000 |
400 ppt |
0 |
|
1. Heptachlor epoxide |
.0002 |
1,000,000 |
200 ppt |
0 |
|
1. Hexachlorobenzene |
.001 |
1000 |
1 ppb |
0 |
|
1. Hexachlorocyclopentadiene |
.05 |
1000 |
50 ppb |
50 |
|
1. Lindane |
.0002 |
1,000,000 |
200 ppt |
200 |
|
1. Methoxychlor |
.04 |
1000 |
40 ppb |
40 |
|
1. Oxamyl [Vydate] |
.2 |
1000 |
200 ppb |
200 |
|
1. PCBs [Polychlorinated biphenyls] |
.0005 |
1,000,000 |
500 ppt |
0 |
|
1. Pentachlorophenol |
.001 |
1000 |
1 ppb |
0 |
|
1. Picloram |
.5 |
1000 |
500 ppb |
500 |
|
1. Simazine |
.004 |
1000 |
4 ppb |
4 |
|
1. Toxaphene |
.003 |
1000 |
3 ppb |
0 |
|
Volatile Organic Contaminants | ||||
|
1. Benzene |
.005 |
1000 |
5 ppb |
0 |
|
1. Carbon tetrachloride |
.005 |
1000 |
5 ppb |
0 |
|
1. Chlorobenzene |
.1 |
1000 |
100 ppb |
100 |
|
1. o-Dichlorobenzene |
.6 |
1000 |
600 ppb |
600 |
|
1. p-Dichlorobenzene |
.075 |
1000 |
75 ppb |
75 |
|
1. 1,2-Dichloroethane |
.005 |
1000 |
5 ppb |
0 |
|
1. 1,1-Dichloroethylene |
.007 |
1000 |
7 ppb |
7 |
|
1. cis-1,2-Dichloroethylene |
.07 |
1000 |
70 ppb |
70 |
|
1. trans-1,2-Dichloroethylene |
.1 |
1000 |
100 ppb |
100 |
|
1. Dichloromethane |
.005 |
1000 |
5 ppb |
0 |
|
1. 1,2-Dichloropropane |
.005 |
1000 |
5 ppb |
0 |
|
1. Ethylbenzene |
.7 |
1000 |
700 ppb |
700 |
|
1. Styrene |
.1 |
1000 |
100 ppb |
100 |
|
1. Tetrachloroethylene |
.005 |
1000 |
5 ppb |
0 |
|
1. 1,2,4-Trichlorobenzene |
.07 |
1000 |
70 ppb |
70 |
|
1. 1,1,1-Trichloroethane |
.2 |
1000 |
200 ppb |
200 |
|
1. 1,1,2-Trichloroethane |
.005 |
1000 |
5 ppb |
3 |
|
1. Trichloroethylene |
.005 |
1000 |
5 ppb |
0 |
|
1. TTHMs [Total trihalomethanes] |
.10 |
1000 |
100 ppb |
0 |
|
1. Toluene |
1 |
- |
1 ppm |
1 |
|
1. Vinyl Chloride |
.002 |
1000 |
2 ppb |
0 |
|
1. Xylenes |
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