Tapcensus

Churchville Elementary School

Non-Transient non-community system in Harford County, Maryland, serving 441 people from ground water. 1 rule violated in the past three years. Owned by local government.

People served 441 ground water
Rules violated, past 3 years 1 one rule can carry several violations
Unresolved 0 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 6 of the last 12 quarters

Quarterly compliance history

VQ4
2023
VQ1
2024
VQ2
2024
VQ3
2024
VQ4
2024
VQ1
2025
–Q2
2025
–Q3
2025
–Q4
2025
–Q1
2026
–Q2
2026
–Q3
2026
UQ4
2026
–No violation identified VViolation identified SSerious violator (EPA enforcement priority) UUndetermined Oldest quarter on the left. Quarters 1 to 12 are the twelve most recently completed quarters at EPA's last data refresh; the 13th is the current quarter up to that date, which EPA reports as undetermined.

Rules violated in the past three years

Oct to Dec 2023 to Oct to Dec 2026

TTHM (Total Trihalomethanes)

TTHMs are four compounds — chloroform, bromodichloromethane, dibromochloromethane, bromoform — formed when chlorine reacts with organic matter in water.
EPA rule code 2950 · Disinfection Byproduct

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.
EPA rule code 2456 · Disinfection Byproduct

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 contaminant
About 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: location confidence HIGHER. 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 Maryland 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.