Chemicals in Drinking Water
Information about chemical contaminants commonly found in drinking water and how they are regulated at public water systems.
Arsenic, Fluoride, Nitrate, and Nitrite - Inorganic Contaminants in Drinking Water
All water contains inorganic compounds unless it is distilled. Common inorganic contaminants—arsenic, fluoride, nitrate and nitrite— their health effects, monitoring and sampling, maximum contaminant levels , and treatment options.
Disinfection Byproducts
What are disinfection byproducts, how do they form, and how public water systems can control them.
Lead and Copper Rule
The Lead and Copper Rule (LCR) program protects public health by minimizing lead and copper in drinking water and applies to all community water systems and non-transient non-community water systems. Find information about guidance, forms and information for public water systems (PWSs), laboratories, and the public.
Lead and Copper Rule Revisions (LCRR) and Lead and Copper Rule Improvements (LCRI)
The Lead and Copper Rule Revisions (LCRR) amend the Lead and Copper Rule. All community and non-transient non-community public water systems are required to comply with the LCRR starting October 16, 2024. The EPA announced the proposed Lead and Copper Rule Improvements (LCRI) November 30, 2023, published the proposed LCRI in the Federal Registry December 6, 2023, and EPA intends to finalize the LCRI by October 16, 2024.
Per- and Polyfluoroalkyl Substances (PFAS) In Drinking Water
PFAS that are regulated and their maximum contaminant levels and hazard levels. Requirements for public water systems’ PFAS monitoring, and timeframe for system compliance.
Radionuclide Testing for Interim Approval of Well Completion
Required testing, required checklists, and other information for completing a well interim approval.
Radionuclides
Information on the occurrence of radionuclides in public water systems (PWSs) in Texas, long-term risks to health, treatment options, compliance determination and public notification requirements.
Monitoring and Testing
Public Water System Chemical Sampling and Monitoring Frequency
Basic information for public water systems about sampling and monitoring requirements.
Accredited Labs for Sample Analysis
Basic information for public water systems about sampling and monitoring requirements.
Understanding Chemical Analysis Results
Reading and interpreting the results of chemical analyses reported to public water systems by a drinking water laboratory.