Community Water System · PWSID PA7280021

Mercersburg Muni Water Auth

Serves 2,350 peopleSurface WaterOwner: Local GovernmentMercersburg, Pennsylvania
Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2003: 57 violations. 1 over the limit · 4 treatment lapses · 38 missed or late tests · 14 notices or reports. Most recent began 2025-07-11.

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

1Over the limit
4Treatment lapse
38Missed or late test
14Notice or report1 open

More violations on record than 90% of active water systems in Pennsylvania. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2003 · Notice or report: 120052006 · Notice or report: 12009 · Notice or report: 12010 · Notice or report: 120102011 · Notice or report: 22011 · Notice or report: 220152018 · Missed or late test: 22018 · Missed or late test: 22019 · Treatment lapse: 12019 · Missed or late test: 72019 · Missed or late test: 72019 · Missed or late test: 72019 · Missed or late test: 72019 · Missed or late test: 72019 · Missed or late test: 72019 · Missed or late test: 72019 · Notice or report: 12020 · Treatment lapse: 22020 · Treatment lapse: 22020 · Missed or late test: 72020 · Missed or late test: 72020 · Missed or late test: 72020 · Missed or late test: 72020 · Missed or late test: 72020 · Missed or late test: 72020 · Missed or late test: 720202021 · Treatment lapse: 12021 · Missed or late test: 52021 · Missed or late test: 52021 · Missed or late test: 52021 · Missed or late test: 52021 · Missed or late test: 52021 · Notice or report: 32021 · Notice or report: 32021 · Notice or report: 32022 · Missed or late test: 22022 · Missed or late test: 22023 · Over the limit: 12023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Notice or report: 12024 · Missed or late test: 62024 · Missed or late test: 62024 · Missed or late test: 62024 · Missed or late test: 62024 · Missed or late test: 62024 · Missed or late test: 62024 · Notice or report: 22024 · Notice or report: 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.
2% over the limit · 17% treatment lapse · 467% missed or late test · 3825% notice or report · 14

Across Pennsylvania, 71% of violations are missed or late tests and 2% are water over a limit.

Open now (1)

  1. 2021-04-11Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-07-11Revised Total Coliform RuleRPTBack in compliance
  2. 2025-06-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  3. 2025-04-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  4. 2025-01-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  5. 2024-07-11Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  6. 2024-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  7. 2024-06-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  8. 2024-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  9. 2024-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  10. 2024-02-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  11. 2024-02-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  12. 2023-10-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2023-09-01Revised Total Coliform RuleMCLBack in compliance
  14. 2023-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  15. 2023-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  16. 2023-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  17. 2023-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  18. 2023-04-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  19. 2023-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  20. 2022-06-01Revised Total Coliform RuleMONBack in compliance
  21. 2022-05-01Revised Total Coliform RuleMONBack in compliance
  22. 2021-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  23. 2021-11-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  24. 2021-10-11Public NoticePN Violation for NPDWR ViolationBack in compliance
  25. 2021-05-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
Show the other 31 entries
  1. 2021-04-11Public NoticePN Violation for NPDWR ViolationOpen
  2. 2021-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  3. 2021-04-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  4. 2021-03-11Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2021-02-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  6. 2020-10-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  7. 2020-10-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  8. 2020-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  9. 2020-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  10. 2020-05-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  11. 2020-02-01Revised Total Coliform RuleMONBack in compliance
  12. 2020-01-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  13. 2020-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  14. 2020-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  15. 2019-09-13Public NoticePN Violation for NPDWR ViolationBack in compliance
  16. 2019-09-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  17. 2019-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  18. 2019-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  19. 2019-08-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  20. 2019-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  21. 2019-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  22. 2019-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  23. 2019-07-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  24. 2018-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  25. 2018-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  26. 2011-11-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  27. 2011-08-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  28. 2010-01-11Public NoticePN Violation for NPDWR ViolationBack in compliance
  29. 2009-02-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  30. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  31. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served2,350
Service connections993
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityMercersburg
EPA ZIP on file17236

Areas served

  • Franklin County

Reading this record

Mercersburg Muni Water Auth is a community water system that draws from surface water and serves about 2,350 people in Mercersburg, Pennsylvania. 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.