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Home Page > Executive Branch > Code of Federal Regulations > Electronic Code of Federal Regulations
e-CFR Data is current as of February 4, 2010
TITLE 40--Protection of Environment
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER D--WATER PROGRAMS
PART 141--NATIONAL PRIMARY DRINKING WATER REGULATIONS
Subpart A--GENERAL
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| Variances and exemptions. |
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Subpart B--MAXIMUM CONTAMINANT LEVELS
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| Maximum contaminant levels for inorganic chemicals. |
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| Maximum contaminant levels for turbidity. |
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Subpart C--MONITORING AND ANALYTICAL REQUIREMENTS
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| Turbidity sampling and analytical requirements. |
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| Inorganic chemical sampling and analytical requirements. |
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| Organic chemicals, sampling and analytical requirements. |
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| Analytical methods for radioactivity. |
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| Monitoring frequency and compliance requirements for radionuclides in community water systems. |
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| Alternate analytical techniques. |
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| Monitoring of consecutive public water systems. |
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Subpart D--REPORTING AND RECORDKEEPING
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| Reporting for unregulated contaminant monitoring results. |
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Subpart E--SPECIAL REGULATIONS, INCLUDING MONITORING REGULATIONS AND PROHIBITION ON LEAD USE
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| Monitoring requirements for unregulated contaminants. |
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| Special monitoring for sodium. |
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| Special monitoring for corrosivity characteristics. |
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| Prohibition on use of lead pipes, solder, and flux. |
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Subpart F--MAXIMUM CONTAMINANT LEVEL GOALS AND MAXIMUM RESIDUAL DISINFECTANT LEVEL GOALS
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| Maximum contaminant level goals for organic contaminants. |
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| Maximum contaminant level goals for inorganic contaminants. |
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| Maximum contaminant level goals for microbiological contaminants. |
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| Maximum contaminant level goals for disinfection byproducts. |
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| Maximum residual disinfectant level goals for disinfectants. |
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| Maximum contaminant level goals for radionuclides. |
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Subpart G--NATIONAL PRIMARY DRINKING WATER REGULATIONS: MAXIMUM CONTAMINANT LEVELS AND MAXIMUM RESIDUAL DISINFECTANT LEVELS
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| Maximum contaminant levels for organic contaminants. |
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| Maximum contaminant levels for inorganic contaminants. |
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| Maximum contaminant levels (MCLs) for microbiological contaminants. |
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| Maximum contaminant levels for disinfection byproducts. |
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| Maximum residual disinfectant levels. |
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| Maximum contaminant levels for radionuclides. |
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Subpart H--FILTRATION AND DISINFECTION
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| Criteria for avoiding filtration. |
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| Analytical and monitoring requirements. |
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| Reporting and recordkeeping requirements. |
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Subpart I--CONTROL OF LEAD AND COPPER
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| Applicability of corrosion control treatment steps to small, medium-size and large water systems. |
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| Description of corrosion control treatment requirements. |
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| Source water treatment requirements. |
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| Lead service line replacement requirements. |
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| Public education and supplemental monitoring requirements. |
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| Monitoring requirements for lead and copper in tap water. |
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| Monitoring requirements for water quality parameters. |
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| Monitoring requirements for lead and copper in source water. |
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| Recordkeeping requirements. |
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Subpart J--USE OF NON-CENTRALIZED TREATMENT DEVICES
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| Criteria and procedures for public water systems using point-of-entry devices. |
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Subpart K--TREATMENT TECHNIQUES
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| Treatment techniques for acrylamide and epichlorohydrin. |
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Subpart L--DISINFECTANT RESIDUALS, DISINFECTION BYPRODUCTS, AND DISINFECTION BYPRODUCT PRECURSORS
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| Reporting and recordkeeping requirements. |
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| Treatment technique for control of disinfection byproduct (DBP) precursors. |
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Subparts M-N--[RESERVED]
Subpart O--CONSUMER CONFIDENCE REPORTS
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| Purpose and applicability of this subpart. |
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| Required additional health information. |
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| Report delivery and recordkeeping. |
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Subpart P--ENHANCED FILTRATION AND DISINFECTION--SYSTEMS SERVING 10,000 OR MORE PEOPLE
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| Criteria for avoiding filtration. |
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| Disinfection profiling and benchmarking. |
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| Filtration sampling requirements. |
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| Reporting and recordkeeping requirements. |
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Subpart Q--PUBLIC NOTIFICATION OF DRINKING WATER VIOLATIONS
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| General public notification requirements. |
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| --Form, manner, and frequency of notice. |
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| --Form, manner, and frequency of notice. |
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| --Form, manner, and frequency of notice. |
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| Content of the public notice. |
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| Notice to new billing units or new customers. |
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| Special notice of the availability of unregulated contaminant monitoring results. |
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| Special notice for exceedance of the SMCL for fluoride. |
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| 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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| Notice by primacy agency on behalf of the public water system. |
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| Special notice for repeated failure to conduct monitoring of the source water forand for failure to determine bin classification or meanlevel. |
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Subpart R--[RESERVED]
Subpart S--GROUND WATER RULE
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| General requirements and applicability. |
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| Sanitary surveys for ground water systems. |
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| Ground water source microbial monitoring and analytical methods. |
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| Treatment technique requirements for ground water systems. |
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| Treatment technique violations for ground water systems. |
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| Reporting and recordkeeping for ground water systems. |
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Subpart T--ENHANCED FILTRATION AND DISINFECTION--SYSTEMS SERVING FEWER THAN 10,000 PEOPLE
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| Who is subject to the requirements of subpart T? |
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| When must my system comply with these requirements? |
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| What does subpart T require? |
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| Is my system subject to the new finished water reservoir requirements? |
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| What is required of new finished water reservoirs? |
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| Is my system subject to the updated watershed control requirements? |
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| What updated watershed control requirements must my unfiltered system implement to continue to avoid filtration? |
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| How does the State determine whether my system's watershed control requirements are adequate? |
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| What is a disinfection profile and who must develop one? |
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| What criteria must a State use to determine that a profile is unnecessary? |
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| How does my system develop a disinfection profile and when must it begin? |
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| What data must my system collect to calculate a disinfection profile? |
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| How does my system use this data to calculate an inactivation ratio? |
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| What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection? |
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| My system has developed an inactivation ratio; what must we do now? |
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| Who has to develop a disinfection benchmark? |
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| What are significant changes to disinfection practice? |
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| What must my system do if we are considering a significant change to disinfection practices? |
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| How is the disinfection benchmark calculated? |
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| What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection? |
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| Is my system required to meet subpart T combined filter effluent turbidity limits? |
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| What strengthened combined filter effluent turbidity limits must my system meet? |
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| 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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| My system practices lime softening--is there any special provision regarding my combined filter effluent? |
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| Is my system subject to individual filter turbidity requirements? |
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| What happens if my system's turbidity monitoring equipment fails? |
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| My system only has two or fewer filters--is there any special provision regarding individual filter turbidity monitoring? |
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| What follow-up action is my system required to take based on continuous turbidity monitoring? |
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| My system practices lime softening--is there any special provision regarding my individual filter turbidity monitoring? |
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| What does subpart T require that my system report to the State? |
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| What records does subpart T require my system to keep? |
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Subpart U--INITIAL DISTRIBUTION SYSTEM EVALUATIONS
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| Very small system waivers. |
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| Subpart V compliance monitoring location recommendations. |
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Subpart V--STAGE 2 DISINFECTION BYPRODUCTS REQUIREMENTS
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| Subpart V monitoring plan. |
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| Additional requirements for consecutive systems. |
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| Conditions requiring increased monitoring. |
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| Operational evaluation levels. |
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| Requirements for remaining on reduced TTHM and HAA5 monitoring based on subpart L results. |
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| Requirements for remaining on increased TTHM and HAA5 monitoring based on subpart L results. |
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| Reporting and recordkeeping requirements. |
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Subpart W--ENHANCED TREATMENT FOR
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| Reporting source water monitoring results. |
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| Grandfathering previously collected data. |
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| Requirements when making a significant change in disinfection practice. |
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| Developing the disinfection profile and benchmark. |
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| Bin classification for filtered systems. |
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| Filtered system additionaltreatment requirements. |
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| Unfiltered systemtreatment requirements. |
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| Schedule for compliance withtreatment requirements. |
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| Requirements for uncovered finished water storage facilities. |
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| Microbial toolbox options for meetingtreatment requirements. |
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| Source toolbox components. |
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| Pre-filtration treatment toolbox components. |
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| Treatment performance toolbox components. |
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| Additional filtration toolbox components. |
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| Inactivation toolbox components. |
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| Recordkeeping requirements. |
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| Requirements to respond to significant deficiencies identified in sanitary surveys performed by EPA. |
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Subpart X--AIRCRAFT DRINKING WATER RULE
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| Applicability and compliance date. |
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| Aircraft water system operations and maintenance plan. |
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| Notification to passengers and crew. |
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| Recordkeeping requirements. |
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