Community Water System · PWSID LA1049028

Magnolia-Spring Creek Subdivision

Serves 444 peopleGroundwaterOwner: PrivateDes Peres, Missouri
4 open treatment violations.

Open for: Groundwater Rule. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2015: 92 violations. 53 over the limit · 4 treatment lapses · 19 missed or late tests · 16 notices or reports. Most recent began 2022-10-01.

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

53Over the limit
4Treatment lapse4 open
19Missed or late test
16Notice or report6 open

More violations on record than 98% 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

200520102015 · Over the limit: 32015 · Over the limit: 32015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Notice or report: 32015 · Notice or report: 320152016 · Over the limit: 52016 · Over the limit: 52016 · Over the limit: 52016 · Missed or late test: 52016 · Missed or late test: 52016 · Missed or late test: 52017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Missed or late test: 52017 · Missed or late test: 52017 · Missed or late test: 52017 · Notice or report: 12018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Treatment lapse: 22019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Missed or late test: 12019 · Notice or report: 12020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Treatment lapse: 22020 · Notice or report: 120202021 · Over the limit: 82021 · Over the limit: 82021 · Over the limit: 82021 · Over the limit: 82021 · Notice or report: 62021 · Notice or report: 62021 · Notice or report: 62022 · Over the limit: 52022 · Over the limit: 52022 · Over the limit: 52022 · Missed or late test: 12022 · Notice or report: 42022 · Notice or report: 42025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
58% over the limit · 534% treatment lapse · 421% missed or late test · 1917% notice or report · 16

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×+Total Haloacetic Acids (HAA5)Trihalomethanes (TTHM)2022-07-01 · Total Haloacetic Acids (HAA5): measured 0.0670 MG/L vs limit 0.0600 MG/L (1.1×)2022-04-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2022-04-01 · Total Haloacetic Acids (HAA5): measured 0.0790 MG/L vs limit 0.0600 MG/L (1.3×)2022-01-01 · Total Haloacetic Acids (HAA5): measured 0.0810 MG/L vs limit 0.0600 MG/L (1.4×)2022-01-01 · Trihalomethanes (TTHM): measured 0.0890 MG/L vs limit 0.0800 MG/L (1.1×)2021-10-01 · Total Haloacetic Acids (HAA5): measured 0.0900 MG/L vs limit 0.0600 MG/L (1.5×)2021-10-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2021-07-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2021-07-01 · Total Haloacetic Acids (HAA5): measured 0.0750 MG/L vs limit 0.0600 MG/L (1.2×)2021-04-01 · Total Haloacetic Acids (HAA5): measured 0.0740 MG/L vs limit 0.0600 MG/L (1.2×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1060 MG/L vs limit 0.0800 MG/L (1.3×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1070 MG/L vs limit 0.0800 MG/L (1.3×)2021-01-01 · Total Haloacetic Acids (HAA5): measured 0.0760 MG/L vs limit 0.0600 MG/L (1.3×)2020-10-01 · Trihalomethanes (TTHM): measured 0.1110 MG/L vs limit 0.0800 MG/L (1.4×)2020-10-01 · Total Haloacetic Acids (HAA5): measured 0.0760 MG/L vs limit 0.0600 MG/L (1.3×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2020-07-01 · Total Haloacetic Acids (HAA5): measured 0.0710 MG/L vs limit 0.0600 MG/L (1.2×)2020-04-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2020-04-01 · Total Haloacetic Acids (HAA5): measured 0.0670 MG/L vs limit 0.0600 MG/L (1.1×)2020-01-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2020-01-01 · Total Haloacetic Acids (HAA5): measured 0.0710 MG/L vs limit 0.0600 MG/L (1.2×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2019-10-01 · Total Haloacetic Acids (HAA5): measured 0.0780 MG/L vs limit 0.0600 MG/L (1.3×)2019-07-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2019-07-01 · Total Haloacetic Acids (HAA5): measured 0.0860 MG/L vs limit 0.0600 MG/L (1.4×)2019-04-01 · Trihalomethanes (TTHM): measured 0.1040 MG/L vs limit 0.0800 MG/L (1.3×)2019-04-01 · Total Haloacetic Acids (HAA5): measured 0.1010 MG/L vs limit 0.0600 MG/L (1.7×)2019-01-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2019-01-01 · Total Haloacetic Acids (HAA5): measured 0.1010 MG/L vs limit 0.0600 MG/L (1.7×)2018-10-01 · Trihalomethanes (TTHM): measured 0.1490 MG/L vs limit 0.0800 MG/L (1.9×)2018-10-01 · Total Haloacetic Acids (HAA5): measured 0.1500 MG/L vs limit 0.0600 MG/L (2.5×)2018-07-01 · Trihalomethanes (TTHM): measured 161.00 UG/L vs limit 80.00 UG/L (2.0×)2018-07-01 · Total Haloacetic Acids (HAA5): measured 143.00 UG/L vs limit 60.00 UG/L (2.4×)2018-04-01 · Trihalomethanes (TTHM): measured 168.00 UG/L vs limit 80.00 UG/L (2.1×)2018-04-01 · Total Haloacetic Acids (HAA5): measured 147.00 UG/L vs limit 60.00 UG/L (2.5×)2018-01-01 · Trihalomethanes (TTHM): measured 179.00 UG/L vs limit 80.00 UG/L (2.2×)2018-01-01 · Total Haloacetic Acids (HAA5): measured 156.00 UG/L vs limit 60.00 UG/L (2.6×)2017-10-01 · Trihalomethanes (TTHM): measured 125.00 UG/L vs limit 80.00 UG/L (1.6×)2017-10-01 · Total Haloacetic Acids (HAA5): measured 95.00 UG/L vs limit 60.00 UG/L (1.6×)2017-07-01 · Trihalomethanes (TTHM): measured 122.00 UG/L vs limit 80.00 UG/L (1.5×)2017-07-01 · Total Haloacetic Acids (HAA5): measured 106.00 UG/L vs limit 60.00 UG/L (1.8×)2017-04-01 · Trihalomethanes (TTHM): measured 111.00 UG/L vs limit 80.00 UG/L (1.4×)2017-04-01 · Total Haloacetic Acids (HAA5): measured 80.00 UG/L vs limit 60.00 UG/L (1.3×)2017-01-01 · Trihalomethanes (TTHM): measured 101.00 UG/L vs limit 80.00 UG/L (1.3×)2017-01-01 · Total Haloacetic Acids (HAA5): measured 61.00 UG/L vs limit 60.00 UG/L (1.0×)2016-10-01 · Total Haloacetic Acids (HAA5): measured 62.00 UG/L vs limit 60.00 UG/L (1.0×)2016-10-01 · Trihalomethanes (TTHM): measured 105.00 UG/L vs limit 80.00 UG/L (1.3×)2016-07-01 · Trihalomethanes (TTHM): measured 105.00 UG/L vs limit 80.00 UG/L (1.3×)2016-07-01 · Total Haloacetic Acids (HAA5): measured 62.00 UG/L vs limit 60.00 UG/L (1.0×)2016-04-01 · Trihalomethanes (TTHM): measured 96.00 UG/L vs limit 80.00 UG/L (1.2×)2015-04-01 · Trihalomethanes (TTHM): measured 113.00 UG/L vs limit 80.00 UG/L (1.4×)2015-04-01 · Total Haloacetic Acids (HAA5): measured 75.00 UG/L vs limit 60.00 UG/L (1.2×)2015-01-01 · Trihalomethanes (TTHM): measured 85.00 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 3 results on file · action level 15 ppb

15 ppb
10 ppb
8 ppb

Open now (10)

  1. 2022-02-09Public NoticePN Violation for NPDWR ViolationOpen
  2. 2021-11-19Public Notice ×2PN Violation for NPDWR ViolationOpen
  3. 2021-08-13Public NoticePN Violation for NPDWR ViolationOpen
  4. 2021-05-20Public NoticePN Violation for NPDWR ViolationOpen
  5. 2021-02-24Public NoticePN Violation for NPDWR ViolationOpen
  6. 2020-06-23Groundwater Rule ×2Failure To Address DeficiencyOpen
  7. 2018-11-27Groundwater RuleFailure To Address DeficiencyOpen
  8. 2018-08-29Groundwater RuleFailure To Address DeficiencyOpen

Every violation on record

  1. 2022-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  2. 2022-08-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2022-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  4. 2022-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0670 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  5. 2022-04-25Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2022-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0790 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  8. 2022-02-09Public NoticePN Violation for NPDWR ViolationOpen
  9. 2022-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0810 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  10. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0890 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2021-11-19Public Notice ×2PN Violation for NPDWR ViolationOpen
  12. 2021-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0900 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  13. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2021-08-13Public NoticePN Violation for NPDWR ViolationOpen
  15. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  16. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2021-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0750 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  18. 2021-05-20Public NoticePN Violation for NPDWR ViolationOpen
  19. 2021-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0740 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  20. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1060 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2021-02-24Public NoticePN Violation for NPDWR ViolationOpen
  22. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1070 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2021-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0760 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  24. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1110 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  25. 2020-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0760 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
Show the other 64 entries
  1. 2020-07-30Public NoticePN Violation for NPDWR ViolationBack in compliance
  2. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2020-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0710 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  4. 2020-06-23Groundwater Rule ×2Failure To Address DeficiencyOpen
  5. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2020-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0670 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  7. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2020-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0710 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  9. 2019-10-24Lead and Copper RuleLead Consumer NoticeBack in compliance
  10. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2019-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0780 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  12. 2019-07-27Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2019-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0860 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  15. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1040 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2019-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1010 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  17. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2019-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1010 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  19. 2018-11-27Groundwater RuleFailure To Address DeficiencyOpen
  20. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1490 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2018-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1500 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  22. 2018-08-29Groundwater RuleFailure To Address DeficiencyOpen
  23. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 161.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  24. 2018-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 143.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  25. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 168.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  26. 2018-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 147.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  27. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 179.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  28. 2018-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 156.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  29. 2017-10-31Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  30. 2017-10-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  31. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 125.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  32. 2017-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 95.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  33. 2017-07-31Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  34. 2017-07-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  35. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  36. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 122.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  37. 2017-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 106.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  38. 2017-05-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  39. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 111.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  40. 2017-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 80.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  41. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 101.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  42. 2017-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 61.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  43. 2016-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 62.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  44. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 105.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  45. 2016-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  46. 2016-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  47. 2016-07-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  48. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 105.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  49. 2016-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 62.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  50. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 96.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  51. 2016-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  52. 2016-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  53. 2015-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  54. 2015-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  55. 2015-09-03Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  56. 2015-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  57. 2015-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  58. 2015-05-15Public NoticePN Violation for NPDWR ViolationBack in compliance
  59. 2015-05-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  60. 2015-05-01Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  61. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 113.00 UG/L · limit 80.00 UG/LBack in compliance
  62. 2015-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 75.00 UG/L · limit 60.00 UG/LBack in compliance
  63. 2015-01-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  64. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 85.00 UG/L · limit 80.00 UG/LBack in compliance

System details

Population served444
Service connections148
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityDes Peres
EPA ZIP on file63131

Areas served

  • Jackson Parish

Reading this record

Magnolia-Spring Creek Subdivision is a community water system that draws from groundwater and serves about 444 people in Des Peres, 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.