Community Water System · PWSID IA2742076

Leon Water Supply

Serves 1,830 peopleSurface WaterOwner: Local GovernmentLeon, Iowa
Nothing open right now.

On record since 2016: 13 violations. 6 over the limit · 3 treatment lapses · 3 missed or late tests · 1 notice or report. Most recent began 2023-07-01.

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

6Over the limit
3Treatment lapse
3Missed or late test
1Notice or report

More violations on record than 90% of active water systems in Iowa. 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: 42016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42018 · Missed or late test: 12018 · Notice or report: 120202021 · Over the limit: 12022 · Over the limit: 12022 · Treatment lapse: 22022 · Treatment lapse: 22022 · Missed or late test: 22022 · Missed or late test: 22023 · Treatment lapse: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
46% over the limit · 623% treatment lapse · 323% missed or late test · 38% notice or report · 1

Across Iowa, 63% of violations are missed or late tests and 7% are water over a limit.

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 3 results on file · action level 15 ppb

11 ppb
5 ppb
3 ppb

Every violation on record

  1. 2023-07-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  2. 2022-09-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  3. 2022-08-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  4. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/LBack in compliance
  5. 2022-02-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  6. 2022-02-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  7. 2021-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0610 MG/LBack in compliance
  8. 2018-07-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  9. 2018-07-01Unknown contaminantTreatment TechniquesBack in compliance
  10. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0810 MG/LBack in compliance
  11. 2016-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0640 MG/LBack in compliance
  12. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/LBack in compliance
  13. 2016-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0610 MG/LBack in compliance

System details

Population served1,830
Service connections825
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityLeon
EPA ZIP on file50144

Areas served

  • Leon, Decatur County

Reading this record

Leon Water Supply is a community water system that draws from surface water and serves about 1,830 people in Leon, Iowa. 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.