Title 40, Part 141 — National Primary Drinking Water Regulations

Applicability.

Definitions.

Coverage.

Variances and exemptions.

Siting requirements.

Effective dates.

Maximum contaminant levels for inorganic chemicals.

[Reserved]

Maximum contaminant levels for turbidity.

Coliform sampling.

Turbidity sampling and analytical requirements.

Inorganic chemical sampling and analytical requirements.

Organic chemicals, sampling and analytical requirements.

Analytical methods for radioactivity.

Monitoring frequency and compliance requirements for radionuclides in community water systems.

Alternate analytical techniques.

Certified laboratories.

Monitoring of consecutive public water systems.

Reporting requirements.

[Reserved]

Record maintenance.

[Reserved]

Reporting for unregulated contaminant monitoring results.

Monitoring requirements for unregulated contaminants.

Special monitoring for sodium.

Special monitoring for corrosivity characteristics.

Maximum contaminant level goals for organic contaminants.

Maximum contaminant level goals for inorganic contaminants.

Maximum contaminant level goals for microbiological contaminants.

Maximum contaminant level goals for disinfection byproducts.

Maximum residual disinfectant level goals for disinfectants.

Maximum contaminant level goals for radionuclides.

Effective dates.

Maximum contaminant levels for organic contaminants.

Maximum contaminant levels for inorganic contaminants.

Maximum contaminant levels (MCLs) for microbiological contaminants.

Maximum contaminant levels for disinfection byproducts.

Maximum residual disinfectant levels.

Maximum contaminant levels for radionuclides.

General requirements.

Criteria for avoiding filtration.

Disinfection.

Filtration.

Analytical and monitoring requirements.

Reporting and recordkeeping requirements.

Recycle provisions.

General requirements and action level.

Applicability of corrosion control treatment steps to small, medium, and large water systems.

Description of corrosion control treatment requirements.

Source water treatment requirements.

Service line inventory and replacement requirements.

Public education and supplemental monitoring and mitigation requirements.

Monitoring requirements for lead and copper in tap water.

Monitoring requirements for water quality parameters.

Monitoring requirements for lead and copper in source water.

Analytical methods.

Reporting requirements.

Recordkeeping requirements.

Monitoring for lead in schools and child care facilities.

Small water system compliance flexibility.

Criteria and procedures for public water systems using point-of-entry devices.

Use of bottled water.

General requirements.

Treatment techniques for acrylamide and epichlorohydrin.

General requirements.

Analytical requirements.

Monitoring requirements.

Compliance requirements.

Reporting and recordkeeping requirements.

Treatment technique for control of disinfection byproduct (DBP) precursors.

Purpose and applicability of this subpart.

Compliance dates.

Content of the reports.

Required additional health information.

Report delivery, reporting, and recordkeeping.

Summary of report contents.

General requirements.

Criteria for avoiding filtration.

Disinfection profiling and benchmarking.

Filtration.

Filtration sampling requirements.

Reporting and recordkeeping requirements.

General public notification requirements.

—Form, manner, and frequency of notice.

—Form, manner, and frequency of notice.

—Form, manner, and frequency of notice.

Content of the public notice.

Notice to new billing units or new customers.

Special notice of the availability of unregulated contaminant monitoring results.

Special notice for exceedance of the SMCL for fluoride.

Special notice for nitrate exceedances above MCL by non-community water systems (NCWS), where granted permission by the primacy agency under § 141.11(d).

Notice by primacy agency on behalf of the public water system.

Special notice for repeated failure to conduct monitoring of the source water for and for failure to determine bin classification or mean level.

General requirements and applicability.

Sanitary surveys for ground water systems.

Ground water source microbial monitoring and analytical methods.

Treatment technique requirements for ground water systems.

Treatment technique violations for ground water systems.

Reporting and recordkeeping for ground water systems.

General requirements.

Who is subject to the requirements of subpart T?

When must my system comply with these requirements?

What does subpart T require?

Is my system subject to the new finished water reservoir requirements?

What is required of new finished water reservoirs?

Is my system subject to the updated watershed control requirements?

What updated watershed control requirements must my unfiltered system implement to continue to avoid filtration?

How does the State determine whether my system's watershed control requirements are adequate?

What is a disinfection profile and who must develop one?

What criteria must a State use to determine that a profile is unnecessary?

How does my system develop a disinfection profile and when must it begin?

What data must my system collect to calculate a disinfection profile?

How does my system use this data to calculate an inactivation ratio?

What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection?

My system has developed an inactivation ratio; what must we do now?

Who has to develop a disinfection benchmark?

What are significant changes to disinfection practice?

What must my system do if we are considering a significant change to disinfection practices?

How is the disinfection benchmark calculated?

What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection?

Is my system required to meet subpart T combined filter effluent turbidity limits?

What strengthened combined filter effluent turbidity limits must my system meet?

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?

My system practices lime softening—is there any special provision regarding my combined filter effluent?

Is my system subject to individual filter turbidity requirements?

What happens if my system's turbidity monitoring equipment fails?

My system only has two or fewer filters—is there any special provision regarding individual filter turbidity monitoring?

What follow-up action is my system required to take based on continuous turbidity monitoring?

My system practices lime softening—is there any special provision regarding my individual filter turbidity monitoring?

What does subpart T require that my system report to the State?

What records does subpart T require my system to keep?

General requirements.

Standard monitoring.

System specific studies.

40/30 certification.

Very small system waivers.

Subpart V compliance monitoring location recommendations.

General requirements.

Routine monitoring.

Subpart V monitoring plan.

Reduced monitoring.

Additional requirements for consecutive systems.

Conditions requiring increased monitoring.

Operational evaluation levels.

Requirements for remaining on reduced TTHM and HAA5 monitoring based on subpart L results.

Requirements for remaining on increased TTHM and HAA5 monitoring based on subpart L results.

Reporting and recordkeeping requirements.

General requirements.

Source water monitoring.

Sampling schedules.

Sampling locations.

Analytical methods.

Approved laboratories.

Reporting source water monitoring results.

Grandfathering previously collected data.

Requirements when making a significant change in disinfection practice.

Developing the disinfection profile and benchmark.

Bin classification for filtered systems.

Filtered system additional treatment requirements.

Unfiltered system treatment requirements.

Schedule for compliance with treatment requirements.

Requirements for uncovered finished water storage facilities.

Microbial toolbox options for meeting treatment requirements.

Source toolbox components.

Pre-filtration treatment toolbox components.

Treatment performance toolbox components.

Additional filtration toolbox components.

Inactivation toolbox components.

Reporting requirements.

Recordkeeping requirements.

Requirements to respond to significant deficiencies identified in sanitary surveys performed by EPA.

Applicability and compliance date.

Definitions.

Coliform sampling plan.

Coliform sampling.

Aircraft water system operations and maintenance plan.

Notification to passengers and crew.

Reporting requirements.

Recordkeeping requirements.

Audits and inspections.

Supplemental treatment.

Violations.

General.

Analytical methods and laboratory certification.

General monitoring requirements for all public water systems.

Routine monitoring requirements for non-community water systems serving 1,000 or fewer people using only ground water.

Routine monitoring requirements for community water systems serving 1,000 or fewer people using only ground water.

Routine monitoring requirements for subpart H public water systems serving 1,000 or fewer people.

Routine monitoring requirements for public water systems serving more than 1,000 people.

Repeat monitoring and requirements.

Coliform treatment technique triggers and assessment requirements for protection against potential fecal contamination.

Violations.

Reporting and recordkeeping.

General requirements.

Analytical requirements.

Monitoring requirements.

Compliance requirements.

Reporting and recordkeeping requirements.

Violations.