Transient Non-Community · PWSID MO6202439

West Tyson County Park

Serves 30 peopleGroundwaterOwner: Local GovernmentClayton, Missouri
Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2010: 10 violations. 1 treatment lapse · 5 missed or late tests · 4 notices or reports. Most recent began 2023-11-07.

None of them is a measurement of contaminated water.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

0Over the limit
1Treatment lapse
5Missed or late test
4Notice or report1 open

More violations on record than 73% of active water systems in Missouri. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052010 · Missed or late test: 22010 · Missed or late test: 220102012 · Missed or late test: 12013 · Missed or late test: 12013 · Notice or report: 32013 · Notice or report: 32013 · Notice or report: 3201520202022 · Missed or late test: 12023 · Treatment lapse: 12023 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
10% treatment lapse · 150% missed or late test · 540% notice or report · 4

Across Missouri, 54% of violations are missed or late tests and 8% are water over a limit.

Open now (1)

  1. 2023-11-07Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2023-11-07Public NoticePN Violation for NPDWR ViolationOpen
  2. 2023-09-02Revised Total Coliform RuleTTBack in compliance
  3. 2022-11-01Revised Total Coliform RuleMONBack in compliance
  4. 2013-10-28Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2013-10-20Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2013-10-07Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2013-10-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  8. 2012-10-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  9. 2010-06-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  10. 2010-05-01E. ColiMonitoring, Source Water (GWR)Back in compliance

System details

Population served30
Service connections2
Water sourceGroundwater
System typeTransient Non-Community
OwnerLocal Government
StatusActive
CityClayton
EPA ZIP on file63105-0000

Areas served

  • St. Louis County

Reading this record

West Tyson County Park is a transient non-community that draws from groundwater and serves about 30 people in Clayton, Missouri. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.