Bates County Pwsd 1
Community water system in Bates County, Missouri, serving 268 people from surface water purchased. 2 rules violated in the past three years. Owned by local government.
Quarterly compliance history
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
2026
2026
Rules violated in the past three years
Oct to Dec 2023 to Oct to Dec 2026
Revised Total Coliform Rule (RTCR)
The 2013 RTCR (effective 2016) replaced the original TCR.
Revised Total Coliform Rule (RTCR)
The 2013 RTCR (effective 2016) replaced the original TCR.
What it means: The 2013 RTCR (effective 2016) replaced the original TCR. It triggers automatic E. coli testing whenever total coliform is found. A single E. coli-positive sample is an acute MCL violation. It also requires systems exceeding 5% total coliform-positive samples to conduct a formal assessment and correct any deficiencies, helping prevent contamination before it escalates.
Health effects: Total coliform bacteria indicate that the disinfection barrier has been breached or fecal contamination is entering the system. E. coli specifically indicates fecal contamination and the possible presence of disease-causing pathogens (norovirus, Salmonella, Shigella, Campylobacter). Illness can be severe in elderly, young children, and immunocompromised individuals.
Limit: Zero E. coli; ≤5% of monthly samples total coliform-positive
About this contaminant
TTHM (Total Trihalomethanes)
TTHMs are four compounds — chloroform, bromodichloromethane, dibromochloromethane, bromoform — formed when chlorine reacts with organic matter in water.
TTHM (Total Trihalomethanes)
TTHMs are four compounds — chloroform, bromodichloromethane, dibromochloromethane, bromoform — formed when chlorine reacts with organic matter in water.
What it means: TTHMs are four compounds — chloroform, bromodichloromethane, dibromochloromethane, bromoform — formed when chlorine reacts with organic matter in water. They are among the most common disinfection byproducts and form more readily in surface water systems with high organic loads.
Health effects: Long-term exposure is associated with increased bladder cancer risk. Some studies link high TTHM exposure to adverse reproductive outcomes. Bromodichloromethane is classified as a possible human carcinogen.
Limit: 0.080 mg/L (80 ppb) locational running annual average (LRAA)
About this contaminant
Total Haloacetic Acids (HAA5)
HAA5 are five haloacetic acids formed when chlorine disinfectants react with naturally occurring organic matter in source water.
Total Haloacetic Acids (HAA5)
HAA5 are five haloacetic acids formed when chlorine disinfectants react with naturally occurring organic matter in source water.
What it means: HAA5 are five haloacetic acids formed when chlorine disinfectants react with naturally occurring organic matter in source water. Higher levels occur with more organic-rich source water or when water sits longer in distribution pipes. The violation indicates the locational running annual average exceeded the MCL.
Health effects: Dichloroacetic acid is a probable human carcinogen (Group B2). Long-term exposure to trichloroacetic acid may also increase cancer risk. Animal studies show liver, kidney, and reproductive effects at high doses.
Limit: 0.060 mg/L (60 ppb) locational running annual average (LRAA)
About this contaminantAbout this data
EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several in the same period. Unresolved means still in violation at EPA's latest data refresh. Measured contaminant levels are not part of this record; each system publishes them in its annual Consumer Confidence Report.
Service area from EPA's Public Water System Service Area Boundaries dataset: State agency. The system's location is the centre of the service area EPA publishes for the system.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Missouri records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.