Community Water System · PWSID LA1111004

Downsville Water System

Serves 216 peopleGroundwater PurchasedOwner: Local GovernmentDownsville, Louisiana
Nothing open right now.

On record since 2008: 79 violations. 46 over the limit · 2 treatment lapses · 28 missed or late tests · 3 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.

46Over the limit
2Treatment lapse
28Missed or late test
3Notice or report

More violations on record than 97% of active water systems in Louisiana. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052008 · Missed or late test: 22008 · Missed or late test: 220102012 · Treatment lapse: 12013 · Missed or late test: 42013 · Missed or late test: 42013 · Missed or late test: 42013 · Missed or late test: 42013 · Notice or report: 12014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 720152016 · Over the limit: 32016 · Over the limit: 32016 · Over the limit: 32016 · Missed or late test: 32016 · Missed or late test: 32016 · Missed or late test: 32017 · Over the limit: 32017 · Over the limit: 32017 · Over the limit: 32017 · Missed or late test: 22017 · Missed or late test: 22017 · Notice or report: 12018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Treatment lapse: 12019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Notice or report: 120202021 · Over the limit: 52021 · Over the limit: 52021 · Over the limit: 52021 · Over the limit: 52021 · Over the limit: 52022 · Over the limit: 42022 · Over the limit: 42022 · Over the limit: 42022 · Over the limit: 42023 · Over the limit: 42023 · Over the limit: 42023 · Over the limit: 42023 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42025 · Over the limit: 32025 · Over the limit: 32025 · Over the limit: 32025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
58% over the limit · 463% treatment lapse · 235% missed or late test · 284% notice or report · 3

Across Louisiana, 31% of violations are missed or late tests and 25% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)Total Haloacetic Acids (HAA5)2025-07-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2025-04-01 · Trihalomethanes (TTHM): measured 0.1040 MG/L vs limit 0.0800 MG/L (1.3×)2025-01-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)2024-10-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2024-07-01 · Trihalomethanes (TTHM): measured 0.1010 MG/L vs limit 0.0800 MG/L (1.3×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2023-10-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2023-07-01 · Trihalomethanes (TTHM): measured 0.0890 MG/L vs limit 0.0800 MG/L (1.1×)2023-04-01 · Trihalomethanes (TTHM): measured 113.00 UG/L vs limit 80.00 UG/L (1.4×)2023-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2022-10-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2022-07-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2022-04-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2022-01-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)2021-10-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2021-07-01 · Trihalomethanes (TTHM): measured 0.1090 MG/L vs limit 0.0800 MG/L (1.4×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1150 MG/L vs limit 0.0800 MG/L (1.4×)2021-01-01 · Total Haloacetic Acids (HAA5): measured 0.0730 MG/L vs limit 0.0600 MG/L (1.2×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1170 MG/L vs limit 0.0800 MG/L (1.5×)2020-10-01 · Trihalomethanes (TTHM): measured 0.1210 MG/L vs limit 0.0800 MG/L (1.5×)2020-10-01 · Total Haloacetic Acids (HAA5): measured 0.0860 MG/L vs limit 0.0600 MG/L (1.4×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1230 MG/L vs limit 0.0800 MG/L (1.5×)2020-07-01 · Total Haloacetic Acids (HAA5): measured 0.0770 MG/L vs limit 0.0600 MG/L (1.3×)2020-04-01 · Trihalomethanes (TTHM): measured 0.1410 MG/L vs limit 0.0800 MG/L (1.8×)2020-04-01 · Total Haloacetic Acids (HAA5): measured 0.0890 MG/L vs limit 0.0600 MG/L (1.5×)2020-01-01 · Trihalomethanes (TTHM): measured 0.1450 MG/L vs limit 0.0800 MG/L (1.8×)2020-01-01 · Total Haloacetic Acids (HAA5): measured 0.0920 MG/L vs limit 0.0600 MG/L (1.5×)2019-10-01 · Trihalomethanes (TTHM): measured 0.1440 MG/L vs limit 0.0800 MG/L (1.8×)2019-10-01 · Total Haloacetic Acids (HAA5): measured 0.0940 MG/L vs limit 0.0600 MG/L (1.6×)2019-07-01 · Trihalomethanes (TTHM): measured 0.1370 MG/L vs limit 0.0800 MG/L (1.7×)2019-07-01 · Total Haloacetic Acids (HAA5): measured 0.0960 MG/L vs limit 0.0600 MG/L (1.6×)2019-04-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2019-04-01 · Total Haloacetic Acids (HAA5): measured 0.0740 MG/L vs limit 0.0600 MG/L (1.2×)2019-01-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2019-01-01 · Total Haloacetic Acids (HAA5): measured 0.0660 MG/L vs limit 0.0600 MG/L (1.1×)2018-10-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2018-07-01 · Trihalomethanes (TTHM): measured 93.00 UG/L vs limit 80.00 UG/L (1.2×)2018-04-01 · Trihalomethanes (TTHM): measured 113.00 UG/L vs limit 80.00 UG/L (1.4×)2018-01-01 · Trihalomethanes (TTHM): measured 125.00 UG/L vs limit 80.00 UG/L (1.6×)2017-10-01 · Trihalomethanes (TTHM): measured 116.00 UG/L vs limit 80.00 UG/L (1.4×)2017-07-01 · Trihalomethanes (TTHM): measured 113.00 UG/L vs limit 80.00 UG/L (1.4×)2017-04-01 · Trihalomethanes (TTHM): measured 87.00 UG/L vs limit 80.00 UG/L (1.1×)2016-07-01 · Trihalomethanes (TTHM): measured 86.00 UG/L vs limit 80.00 UG/L (1.1×)2016-04-01 · Trihalomethanes (TTHM): measured 112.00 UG/L vs limit 80.00 UG/L (1.4×)2016-01-01 · Trihalomethanes (TTHM): measured 134.00 UG/L vs limit 80.00 UG/L (1.7×)
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 4 results on file · action level 15 ppb

4 ppb
2 ppb
2 ppb
2 ppb

Every violation on record

  1. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1040 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2025-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1010 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0880 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0890 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 113.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  11. 2023-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2022-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1090 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1150 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2021-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0730 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  20. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1170 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1210 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2020-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0860 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  23. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1230 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  24. 2020-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0770 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  25. 2020-05-14Public NoticePN Violation for NPDWR ViolationBack in compliance
Show the other 54 entries
  1. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1410 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2020-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0890 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  3. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1450 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2020-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0920 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  5. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1440 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2019-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0940 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  7. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1370 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2019-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0960 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  9. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2019-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0740 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  11. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2019-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0660 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  13. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 93.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  15. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 113.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  16. 2018-03-02Groundwater RuleFailure To Address DeficiencyBack in compliance
  17. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 125.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  18. 2017-10-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  19. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 116.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  20. 2017-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  21. 2017-07-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  22. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 113.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  23. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 87.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  24. 2016-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  25. 2016-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  26. 2016-07-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  27. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 86.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  28. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 112.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  29. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 134.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  30. 2015-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  31. 2015-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  32. 2015-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  33. 2015-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  34. 2015-05-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  35. 2015-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  36. 2015-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  37. 2014-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  38. 2014-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  39. 2014-07-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  40. 2014-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  41. 2014-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  42. 2014-05-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  43. 2014-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  44. 2014-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  45. 2014-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  46. 2014-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  47. 2013-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  48. 2013-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  49. 2013-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  50. 2013-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  51. 2013-02-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  52. 2012-05-10Groundwater RuleFailure To Address DeficiencyBack in compliance
  53. 2008-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  54. 2008-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance

System details

Population served216
Service connections72
Water sourceGroundwater Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityDownsville
EPA ZIP on file71234

Areas served

  • Union Parish

Reading this record

Downsville Water System is a community water system that draws from groundwater purchased and serves about 216 people in Downsville, Louisiana. 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.