Community Water System · PWSID MO1010510

Maysville Pws

Serves 1,096 peopleSurface WaterOwner: Local GovernmentMaysville, Missouri
Nothing open right now.

On record since 2011: 62 violations. 19 over the limit · 37 treatment lapses · 4 missed or late tests · 2 notices or reports. Most recent began 2025-07-01.

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

19Over the limit
37Treatment lapse
4Missed or late test
2Notice or report

More violations on record than 97% 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

200520102011 · Over the limit: 42011 · Over the limit: 42011 · Over the limit: 42011 · Over the limit: 42011 · Treatment lapse: 12012 · Treatment lapse: 62012 · Treatment lapse: 62012 · Treatment lapse: 62012 · Treatment lapse: 62012 · Treatment lapse: 62012 · Treatment lapse: 62013 · Over the limit: 32013 · Over the limit: 32013 · Over the limit: 32013 · Treatment lapse: 62013 · Treatment lapse: 62013 · Treatment lapse: 62013 · Treatment lapse: 62013 · Treatment lapse: 62013 · Treatment lapse: 62013 · Notice or report: 12014 · Treatment lapse: 72014 · Treatment lapse: 72014 · Treatment lapse: 72014 · Treatment lapse: 72014 · Treatment lapse: 72014 · Treatment lapse: 72014 · Treatment lapse: 72015 · Treatment lapse: 52015 · Treatment lapse: 52015 · Treatment lapse: 52015 · Treatment lapse: 52015 · Treatment lapse: 520152016 · Over the limit: 32016 · Over the limit: 32016 · Over the limit: 32016 · Treatment lapse: 42016 · Treatment lapse: 42016 · Treatment lapse: 42016 · Treatment lapse: 42017 · Over the limit: 62017 · Over the limit: 62017 · Over the limit: 62017 · Over the limit: 62017 · Over the limit: 62017 · Over the limit: 620202022 · Over the limit: 12024 · Treatment lapse: 82024 · Treatment lapse: 82024 · Treatment lapse: 82024 · Treatment lapse: 82024 · Treatment lapse: 82024 · Treatment lapse: 82024 · Treatment lapse: 82024 · Treatment lapse: 82024 · Missed or late test: 12025 · Over the limit: 22025 · Over the limit: 22025 · Missed or late test: 32025 · Missed or late test: 32025 · Missed or late test: 32025 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
31% over the limit · 1960% treatment lapse · 376% missed or late test · 43% 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)Total Haloacetic Acids (HAA5)Chlorite2025-07-01 · Trihalomethanes (TTHM): measured 104.88 UG/L vs limit 80.00 UG/L (1.3×)2025-07-01 · Total Haloacetic Acids (HAA5): measured 78.15 UG/L vs limit 60.00 UG/L (1.3×)2022-12-01 · Chlorite: measured 1.20 MG/L vs limit 1.00 MG/L (1.2×)2017-10-01 · Trihalomethanes (TTHM): measured 94.00 UG/L vs limit 80.00 UG/L (1.2×)2017-07-01 · Trihalomethanes (TTHM): measured 98.00 UG/L vs limit 80.00 UG/L (1.2×)2017-04-01 · Total Haloacetic Acids (HAA5): measured 61.00 UG/L vs limit 60.00 UG/L (1.0×)2017-04-01 · Trihalomethanes (TTHM): measured 96.00 UG/L vs limit 80.00 UG/L (1.2×)2017-01-01 · Total Haloacetic Acids (HAA5): measured 64.00 UG/L vs limit 60.00 UG/L (1.1×)2017-01-01 · Trihalomethanes (TTHM): measured 98.00 UG/L vs limit 80.00 UG/L (1.2×)2016-10-01 · Trihalomethanes (TTHM): measured 92.00 UG/L vs limit 80.00 UG/L (1.1×)2016-07-01 · Trihalomethanes (TTHM): measured 91.00 UG/L vs limit 80.00 UG/L (1.1×)2016-04-01 · Trihalomethanes (TTHM): measured 94.00 UG/L vs limit 80.00 UG/L (1.2×)
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 6 results on file · action level 15 ppb

4.4 ppb
3.8 ppb
2.1 ppb
1.8 ppb
1.8 ppb
1.5 ppb

Every violation on record

  1. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 104.88 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  2. 2025-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 78.15 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  3. 2025-07-01Chlorine dioxideNotification, StatePeriod ended · no return to compliance on file
  4. 2025-07-01Surface water filtration (IESWTR) ×2Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  5. 2025-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  6. 2024-11-01Revised Total Coliform RuleMONBack in compliance
  7. 2024-11-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  8. 2024-10-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  9. 2024-09-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  10. 2024-09-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Period ended · no return to compliance on file
  11. 2024-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  12. 2024-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  13. 2024-08-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  14. 2024-08-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Period ended · no return to compliance on file
  15. 2022-12-01ChloriteMCL, Averagemeasured 1.20 MG/L · limit 1.00 MG/LBack in compliance
  16. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 94.00 UG/L · limit 80.00 UG/LBack in compliance
  17. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 98.00 UG/L · limit 80.00 UG/LBack in compliance
  18. 2017-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 61.00 UG/L · limit 60.00 UG/LBack in compliance
  19. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 96.00 UG/L · limit 80.00 UG/LBack in compliance
  20. 2017-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 64.00 UG/L · limit 60.00 UG/LBack in compliance
  21. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 98.00 UG/L · limit 80.00 UG/LBack in compliance
  22. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 92.00 UG/L · limit 80.00 UG/LBack in compliance
  23. 2016-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  24. 2016-08-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  25. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 91.00 UG/L · limit 80.00 UG/LBack in compliance
Show the other 36 entries
  1. 2016-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  2. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 94.00 UG/L · limit 80.00 UG/LBack in compliance
  3. 2016-02-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  4. 2015-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  5. 2015-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  6. 2015-07-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  7. 2015-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  8. 2015-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  9. 2014-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  10. 2014-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  11. 2014-05-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  12. 2014-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  13. 2014-04-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  14. 2014-04-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  15. 2014-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  16. 2013-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  17. 2013-09-22Public NoticePN Violation for NPDWR ViolationBack in compliance
  18. 2013-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  19. 2013-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 104.08 UG/LBack in compliance
  20. 2013-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  21. 2013-05-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  22. 2013-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 90.43 UG/LBack in compliance
  23. 2013-04-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  24. 2013-03-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  25. 2013-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 86.77 UG/LBack in compliance
  26. 2012-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  27. 2012-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  28. 2012-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  29. 2012-05-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  30. 2012-04-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  31. 2012-04-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  32. 2011-12-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  33. 2011-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 87.69 UG/LBack in compliance
  34. 2011-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 103.27 UG/LBack in compliance
  35. 2011-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 114.71 UG/LBack in compliance
  36. 2011-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 126.08 UG/LBack in compliance

System details

Population served1,096
Service connections461
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityMaysville
EPA ZIP on file64469-0000

Areas served

  • Maysville, Dekalb County

Reading this record

Maysville Pws is a community water system that draws from surface water and serves about 1,096 people in Maysville, 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.