Community Water System · PWSID MO3024170

Cooper County Consolidated Pwsd # 1

Serves 2,451 peopleSurface Water PurchasedOwner: Local GovernmentBoonville, Missouri
Nothing open right now.

On record since 2011: 25 violations. 20 over the limit · 3 missed or late tests · 2 notices or reports. Most recent began 2025-05-31.

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

20Over the limit
0Treatment lapse
3Missed or late test
2Notice or report

More violations on record than 90% 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 · Missed or late test: 22011 · Missed or late test: 22015 · Over the limit: 22015 · Over the limit: 220152016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42017 · Over the limit: 32017 · Over the limit: 32017 · Over the limit: 32018 · Over the limit: 12019 · Over the limit: 62019 · Over the limit: 62019 · Over the limit: 62019 · Over the limit: 62019 · Over the limit: 62019 · Over the limit: 62020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 420202023 · Notice or report: 12024 · Missed or late test: 12025 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
80% over the limit · 2012% missed or late test · 38% 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)2020-04-01 · Trihalomethanes (TTHM): measured 86.00 UG/L vs limit 80.00 UG/L (1.1×)2020-04-01 · Total Haloacetic Acids (HAA5): measured 69.70 UG/L vs limit 60.00 UG/L (1.2×)2020-01-01 · Trihalomethanes (TTHM): measured 89.00 UG/L vs limit 80.00 UG/L (1.1×)2020-01-01 · Total Haloacetic Acids (HAA5): measured 77.00 UG/L vs limit 60.00 UG/L (1.3×)2019-10-01 · Trihalomethanes (TTHM): measured 86.00 UG/L vs limit 80.00 UG/L (1.1×)2019-10-01 · Total Haloacetic Acids (HAA5): measured 62.00 UG/L vs limit 60.00 UG/L (1.0×)2019-07-01 · Trihalomethanes (TTHM): measured 98.00 UG/L vs limit 80.00 UG/L (1.2×)2019-07-01 · Total Haloacetic Acids (HAA5): measured 65.00 UG/L vs limit 60.00 UG/L (1.1×)2019-04-01 · Trihalomethanes (TTHM): measured 94.00 UG/L vs limit 80.00 UG/L (1.2×)2019-01-01 · Trihalomethanes (TTHM): measured 92.00 UG/L vs limit 80.00 UG/L (1.1×)2018-10-01 · Trihalomethanes (TTHM): measured 93.00 UG/L vs limit 80.00 UG/L (1.2×)2017-07-01 · Trihalomethanes (TTHM): measured 89.00 UG/L vs limit 80.00 UG/L (1.1×)2017-04-01 · Trihalomethanes (TTHM): measured 105.00 UG/L vs limit 80.00 UG/L (1.3×)2017-01-01 · Trihalomethanes (TTHM): measured 114.00 UG/L vs limit 80.00 UG/L (1.4×)2016-10-01 · Trihalomethanes (TTHM): measured 111.00 UG/L vs limit 80.00 UG/L (1.4×)2016-07-01 · Trihalomethanes (TTHM): measured 102.00 UG/L vs limit 80.00 UG/L (1.3×)2016-04-01 · Trihalomethanes (TTHM): measured 91.00 UG/L vs limit 80.00 UG/L (1.1×)2016-01-01 · Trihalomethanes (TTHM): measured 96.00 UG/L vs limit 80.00 UG/L (1.2×)2015-10-01 · Trihalomethanes (TTHM): measured 94.00 UG/L vs limit 80.00 UG/L (1.2×)2015-07-01 · Trihalomethanes (TTHM): measured 87.00 UG/L vs limit 80.00 UG/L (1.1×)
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

1.9 ppb
1.9 ppb
1.8 ppb
1.8 ppb
1.8 ppb

Every violation on record

  1. 2025-05-31Public NoticePN Violation for NPDWR ViolationBack in compliance
  2. 2024-04-01Revised Total Coliform RuleMONBack in compliance
  3. 2023-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  4. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 86.00 UG/L · limit 80.00 UG/LBack in compliance
  5. 2020-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 69.70 UG/L · limit 60.00 UG/LBack in compliance
  6. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 89.00 UG/L · limit 80.00 UG/LBack in compliance
  7. 2020-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 77.00 UG/L · limit 60.00 UG/LBack in compliance
  8. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 86.00 UG/L · limit 80.00 UG/LBack in compliance
  9. 2019-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 62.00 UG/L · limit 60.00 UG/LBack in compliance
  10. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 98.00 UG/L · limit 80.00 UG/LBack in compliance
  11. 2019-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 65.00 UG/L · limit 60.00 UG/LBack in compliance
  12. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 94.00 UG/L · limit 80.00 UG/LBack in compliance
  13. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 92.00 UG/L · limit 80.00 UG/LBack in compliance
  14. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 93.00 UG/L · limit 80.00 UG/LBack in compliance
  15. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 89.00 UG/L · limit 80.00 UG/LBack in compliance
  16. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 105.00 UG/L · limit 80.00 UG/LBack in compliance
  17. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 114.00 UG/L · limit 80.00 UG/LBack in compliance
  18. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 111.00 UG/L · limit 80.00 UG/LBack in compliance
  19. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 102.00 UG/L · limit 80.00 UG/LBack in compliance
  20. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 91.00 UG/L · limit 80.00 UG/LBack in compliance
  21. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 96.00 UG/L · limit 80.00 UG/LBack in compliance
  22. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 94.00 UG/L · limit 80.00 UG/LBack in compliance
  23. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 87.00 UG/L · limit 80.00 UG/LBack in compliance
  24. 2011-10-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  25. 2011-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance

System details

Population served2,451
Service connections931
Water sourceSurface Water Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityBoonville
EPA ZIP on file65233-0000

Areas served

  • Boonville, Cooper County

Reading this record

Cooper County Consolidated Pwsd # 1 is a community water system that draws from surface water purchased and serves about 2,451 people in Boonville, 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.