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Title 40--Protection of Environment
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY
PART 141--NATIONAL PRIMARY DRINKING WATER REGULATIONS
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 | 141.1 | Applicability. |
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| 141.2 | Definitions. |
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| 141.3 | Coverage. |
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| 141.4 | Variances and exemptions. |
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| 141.5 | Siting requirements. |
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| 141.6 | Effective dates. |
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| 141.11 | Maximum contaminant levels for inorganic chemicals. |
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| 141.12 | Maximum contaminant levels for total trihalomethanes. |
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| 141.13 | Maximum contaminant levels for turbidity. |
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| 141.15 | Maximum contaminant levels for radium-226, radium-228, and gross alpha particle radioactivity in community water systems. |
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| 141.16 | Maximum contaminant levels for beta particle and photon radioactivity from man-made radionuclides in community water systems. |
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| 141.21 | Coliform sampling. |
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| 141.22 | Turbidity sampling and analytical requirements. |
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| 141.23 | Inorganic chemical sampling and analytical requirements. |
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| 141.23 | Inorganic chemical sampling and analytical requirements. |
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| 141.24 | Organic chemicals, sampling and analytical requirements. |
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| 141.24 | Organic chemicals other than total trihalomethanes, sampling and analytical methods. |
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| 141.25 | Analytical methods for radioactivity. |
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| 141.25 | Analytical methods for radioactivity. |
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| 141.26 | Monitoring frequency for radioactivity in community water systems. |
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| 141.26 | Monitoring frequency and compliance requirements for radionuclides in community water systems |
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| 141.27 | Alternate analytical techniques. |
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| 141.28 | Certified laboratories. |
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| 141.29 | Monitoring of consecutive public water systems. |
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| 141.30 | Total trihalomethanes sampling, analytical and other requirements. |
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| 141.31 | Reporting requirements. |
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| 141.32 | Public notification. |
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| 141.33 | Record maintenance. |
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| 141.35 | Reporting of unregulated contaminant monitoring results. |
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| 141.40 | Monitoring requirements for unregulated contaminants. |
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| 141.41 | Special monitoring for sodium. |
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| 141.42 | Special monitoring for corrosivity characteristics. |
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| 141.43 | Prohibition on use of lead pipes, solder, and flux. |
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| 141.50 | Maximum contaminant level goals for organic contaminants. |
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| 141.51 | Maximum contaminant level goals for inorganic contaminants. |
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| 141.52 | Maximum contaminant level goals for microbiological contaminants. |
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| 141.53 | Maximum contaminant level goals for disinfection byproducts. |
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| 141.54 | Maximum residual disinfectant level goals for disinfectants. |
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| 141.55 | Maximum contaminant level goals for radionuclides. |
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| 141.60 | Effective dates. |
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| 141.61 | Maximum contaminant levels for organic contaminants. |
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| 141.62 | Maximum contaminant levels for inorganic contaminants. |
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| 141.63 | Maximum contaminant levels (MCLs) for microbiological contaminants. |
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| 141.64 | Maximum contaminant levels for disinfection byproducts. |
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| 141.65 | Maximum residual disinfectant levels. |
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| 141.66 | Maximum contaminant levels for radionuclides. |
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| 141.70 | General requirements. |
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| 141.71 | Criteria for avoiding filtration. |
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| 141.72 | Disinfection. |
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| 141.73 | Filtration. |
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| 141.74 | Analytical and monitoring requirements. |
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| 141.75 | Reporting and recordkeeping requirements. |
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| 141.76 | Recycle provisions. |
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| 141.80 | General requirements. |
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| 141.81 | Applicability of corrosion control treatment steps to small, medium-size and large water systems. |
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| 141.82 | Description of corrosion control treatment requirements. |
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| 141.83 | Source water treatment requirements. |
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| 141.84 | Lead service line replacement requirements. |
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| 141.85 | Public education and supplemental monitoring requirements. |
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| 141.86 | Monitoring requirements for lead and copper in tap water. |
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| 141.87 | Monitoring requirements for water quality parameters. |
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| 141.88 | Monitoring requirements for lead and copper in source water. |
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| 141.89 | Analytical methods. |
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| 141.90 | Reporting requirements. |
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| 141.91 | Recordkeeping requirements. |
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| 141.100 | Criteria and procedures for public water systems using point-of-entry devices. |
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| 141.101 | Use of bottled water. |
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| 141.110 | General requirements. |
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| 141.111 | Treatment techniques for acrylamide and epichlorohydrin. |
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| 141.130 | General requirements. |
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| 141.131 | Analytical requirements. |
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| 141.132 | Monitoring requirements. |
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| 141.133 | Compliance requirements. |
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| 141.134 | Reporting and recordkeeping requirements. |
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| 141.135 | Treatment technique for control of disinfection byproduct (DBP) precursors. |
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| 141.151 | Purpose and applicability of this subpart. |
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| 141.152 | Effective dates. |
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| 141.153 | Content of the reports. |
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| 141.154 | Required additional health information. |
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| 141.155 | Report delivery and recordkeeping. |
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| 141.170 | General requirements. |
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| 141.171 | Criteria for avoiding filtration. |
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| 141.172 | Disinfection profiling and benchmarking. |
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| 141.173 | Filtration. |
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| 141.174 | Filtration sampling requirements. |
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| 141.175 | Reporting and recordkeeping requirements. |
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| 141.201 | General public notification requirements. |
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| 141.202 | Tier 1 Public Notice--Form, manner, and frequency of notice. |
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| 141.203 | Tier 2 Public Notice--Form, manner, and frequency of notice. |
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| 141.204 | Tier 3 Public Notice--Form, manner, and frequency of notice. |
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| 141.205 | Content of the public notice. |
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| 141.206 | Notice to new billing units or new customers. |
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| 141.207 | Special notice of the availability of unregulated contaminant monitoring results. |
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| 141.208 | Special notice for exceedance of the SMCL for fluoride. |
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| 141.209 | Special notice for nitrate exceedances above MCL by non-community water systems (NCWS), where granted permission by the primacy agency under 141.11(d) |
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| 141.210 | Notice by primacy agency on behalf of the public water system. |
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| 141.500 | General requirements. |
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| 141.501 | Who is subject to the requirements of subpart T? |
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| 141.502 | When must my system comply with these requirements? |
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| 141.503 | What does subpart T require? |
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| 141.510 | Is my system subject to the new finished water reservoir requirements? |
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| 141.511 | What is required of new finished water reservoirs? |
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| 141.520 | Is my system subject to the updated watershed control requirements? |
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| 141.521 | What updated watershed control requirements must my unfiltered system implement to continue to avoid filtration? |
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| 141.522 | How does the State determine whether my system's watershed control requirements are adequate? |
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| 141.530 | What is a disinfection profile and who must develop one? |
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| 141.531 | What criteria must a State use to determine that a profile is unnecessary? |
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| 141.532 | How does my system develop a disinfection profile and when must it begin? |
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| 141.533 | What data must my system collect to calculate a disinfection profile? |
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| 141.534 | How does my system use this data to calculate an inactivation ratio? |
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| 141.535 | What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection? |
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| 141.536 | My system has developed an inactivation ratio; what must we do now? |
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| 141.540 | Who has to develop a disinfection benchmark? |
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| 141.541 | What are significant changes to disinfection practice? |
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| 141.542 | What must my system do if we are considering a significant change to disinfection practices? |
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| 141.543 | How is the disinfection benchmark calculated? |
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| 141.544 | What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection? |
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| 141.550 | Is my system required to meet subpart T combined filter effluent turbidity limits? |
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| 141.551 | What strengthened combined filter effluent turbidity limits must my system meet? |
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| 141.552 | My system consists of ``alternative filtration'' and is required to conduct a demonstration--what is required of my system and how does the State establish my turbidity limits? |
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| 141.553 | My system practices lime softening--is there any special provision regarding my combined filter effluent? |
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| 141.560 | Is my system subject to individual filter turbidity requirements? |
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| 141.561 | What happens if my system's turbidity monitoring equipment fails? |
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| 141.562 | My system only has two or fewer filters--is there any special provision regarding individual filter turbidity monitoring? |
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| 141.563 | What follow-up action is my system required to take based on continuous turbidity monitoring? |
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| 141.564 | My system practices lime softening--is there any special provision regarding my individual filter turbidity monitoring? |
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| 141.570 | What does subpart T require that my system report to the State? |
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| 141.571 | What records does subpart T require my system to keep? |
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