Community Water System · PWSID MO1010851

Weston Pws

Serves 1,850 peopleGroundwaterOwner: Local GovernmentWeston, Missouri
Nothing open right now.

On record since 2016: 10 violations. 1 over the limit · 1 treatment lapse · 6 missed or late tests · 2 notices or reports. Most recent began 2025-05-01.

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

1Over the limit
1Treatment lapse
6Missed or late test
2Notice or report

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

2005201020152016 · Over the limit: 12019 · Missed or late test: 12020 · Treatment lapse: 12020 · Notice or report: 120202023 · Missed or late test: 32023 · Missed or late test: 32023 · Missed or late test: 32024 · Notice or report: 12025 · Missed or late test: 22025 · Missed or late test: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
10% over the limit · 110% treatment lapse · 160% missed or late test · 620% notice or report · 2

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

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2016-04-01 · Trihalomethanes (TTHM): measured 81.00 UG/L vs limit 80.00 UG/L (1.0×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 5 results on file · action level 15 ppb

1 ppb
0 ppb
0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2025-05-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Period ended · no return to compliance on file
  2. 2025-01-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  3. 2024-10-17Lead service line inventoryRPTBack in compliance
  4. 2023-09-01Revised Total Coliform RuleMONBack in compliance
  5. 2023-07-01Revised Total Coliform RuleMONBack in compliance
  6. 2023-01-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  7. 2020-09-07Public NoticePN Violation without NPDWR ViolationBack in compliance
  8. 2020-06-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  9. 2019-06-01Revised Total Coliform RuleMONBack in compliance
  10. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 81.00 UG/L · limit 80.00 UG/LBack in compliance

System details

Population served1,850
Service connections831
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWeston
EPA ZIP on file64098-0000

Areas served

  • Weston, Platte County

Reading this record

Weston Pws is a community water system that draws from groundwater and serves about 1,850 people in Weston, 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.