Community Water System · PWSID IA7450019

Mallard Water Supply

Serves 257 peopleGroundwater PurchasedOwner: Local GovernmentMallard, Iowa
Nothing open right now.

On record since 2016: 23 violations. 18 over the limit · 5 missed or late tests. Most recent began 2024-10-01.

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

18Over the limit
0Treatment lapse
5Missed or late test
0Notice or report

More violations on record than 95% 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 · Missed or late test: 22016 · Missed or late test: 22017 · Over the limit: 12019 · Over the limit: 32019 · Over the limit: 32019 · Over the limit: 32019 · Missed or late test: 12020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 420202021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42022 · Over the limit: 22022 · Over the limit: 22022 · Missed or late test: 12024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
78% over the limit · 1822% missed or late test · 5

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 4 results on file · action level 15 ppb

2 ppb
0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2024-10-01ArsenicMCL, Averagemeasured 0.0130 MG/LPeriod ended · no return to compliance on file
  2. 2024-07-01ArsenicMCL, Averagemeasured 0.0140 MG/LBack in compliance
  3. 2024-04-01ArsenicMCL, Averagemeasured 0.0130 MG/LBack in compliance
  4. 2024-03-01ManganeseMonitoring, RegularBack in compliance
  5. 2024-01-01ArsenicMCL, Averagemeasured 0.0100 MG/LBack in compliance
  6. 2022-08-01ManganeseMonitoring, RegularBack in compliance
  7. 2022-04-01ArsenicMCL, Averagemeasured 0.0110 MG/LBack in compliance
  8. 2022-01-01ArsenicMCL, Averagemeasured 0.0120 MG/LPeriod ended · no return to compliance on file
  9. 2021-10-01ArsenicMCL, Averagemeasured 0.0140 MG/LPeriod ended · no return to compliance on file
  10. 2021-07-01ArsenicMCL, Averagemeasured 0.0160 MG/LPeriod ended · no return to compliance on file
  11. 2021-04-01ArsenicMCL, Averagemeasured 0.0140 MG/LPeriod ended · no return to compliance on file
  12. 2021-01-01ArsenicMCL, Averagemeasured 0.0140 MG/LPeriod ended · no return to compliance on file
  13. 2020-10-01ArsenicMCL, Averagemeasured 0.0120 MG/LPeriod ended · no return to compliance on file
  14. 2020-07-01ArsenicMCL, Averagemeasured 0.0160 MG/LPeriod ended · no return to compliance on file
  15. 2020-04-01ArsenicMCL, Averagemeasured 0.0180 MG/LPeriod ended · no return to compliance on file
  16. 2020-01-01ArsenicMCL, Averagemeasured 0.0220 MG/LPeriod ended · no return to compliance on file
  17. 2019-10-01ArsenicMCL, Averagemeasured 0.0170 MG/LPeriod ended · no return to compliance on file
  18. 2019-07-01ArsenicMCL, Averagemeasured 0.0120 MG/LPeriod ended · no return to compliance on file
  19. 2019-07-01ArsenicMonitoring, RegularBack in compliance
  20. 2019-04-01ArsenicMCL, Averagemeasured 0.0130 MG/LPeriod ended · no return to compliance on file
  21. 2017-10-01ArsenicMCL, Single Samplemeasured 0.0160 MG/LPeriod ended · no return to compliance on file
  22. 2016-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  23. 2016-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance

System details

Population served257
Service connections163
Water sourceGroundwater Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityMallard
EPA ZIP on file50562

Areas served

  • Mallard, Palo Alto County

Reading this record

Mallard Water Supply is a community water system that draws from groundwater purchased and serves about 257 people in Mallard, 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.