Community Water System · PWSID LA1101013

Port of West St Mary

Serves 400 peopleGroundwaterOwner: Local GovernmentFranklin, Louisiana
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 2015: 22 violations. 13 over the limit · 2 treatment lapses · 4 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.

13Over the limit
2Treatment lapse
4Missed or late test
3Notice or report1 open

More violations on record than 79% 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

200520102015 · Over the limit: 32015 · Over the limit: 32015 · Over the limit: 32015 · Missed or late test: 22015 · Missed or late test: 220152016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Missed or late test: 22016 · Missed or late test: 22016 · Notice or report: 12017 · Over the limit: 22017 · Over the limit: 22017 · Notice or report: 12018 · Treatment lapse: 12019 · Over the limit: 32019 · Over the limit: 32019 · Over the limit: 32019 · Treatment lapse: 120202021 · Notice or report: 12025 · Over the limit: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
59% over the limit · 139% treatment lapse · 218% missed or late test · 414% 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)2025-07-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2019-10-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2019-07-01 · Trihalomethanes (TTHM): measured 0.1090 MG/L vs limit 0.0800 MG/L (1.4×)2019-04-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2017-04-01 · Trihalomethanes (TTHM): measured 81.00 UG/L vs limit 80.00 UG/L (1.0×)2017-01-01 · Trihalomethanes (TTHM): measured 99.00 UG/L vs limit 80.00 UG/L (1.2×)2016-10-01 · Trihalomethanes (TTHM): measured 115.00 UG/L vs limit 80.00 UG/L (1.4×)2016-07-01 · Trihalomethanes (TTHM): measured 128.00 UG/L vs limit 80.00 UG/L (1.6×)2016-04-01 · Trihalomethanes (TTHM): measured 123.00 UG/L vs limit 80.00 UG/L (1.5×)2016-01-01 · Trihalomethanes (TTHM): measured 113.00 UG/L vs limit 80.00 UG/L (1.4×)2015-10-01 · Trihalomethanes (TTHM): measured 109.00 UG/L vs limit 80.00 UG/L (1.4×)2015-07-01 · Trihalomethanes (TTHM): measured 102.00 UG/L vs limit 80.00 UG/L (1.3×)2015-04-01 · Trihalomethanes (TTHM): measured 123.00 UG/L vs limit 80.00 UG/L (1.5×)
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

6 ppb
0 ppb
0 ppb
0 ppb
0 ppb

Copper, 90th percentile 1 result on file · action level 1.3 mg/L

1.9 mg/L

Open now (1)

  1. 2021-12-01Groundwater RuleNotification, StateOpen

Every violation on record

  1. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2021-12-01Groundwater RuleNotification, StateOpen
  3. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LBack in compliance
  4. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1090 MG/L · limit 0.0800 MG/LBack in compliance
  5. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LBack in compliance
  6. 2019-01-11Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
  7. 2018-07-11Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
  8. 2017-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  9. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 81.00 UG/L · limit 80.00 UG/LBack in compliance
  10. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 99.00 UG/L · limit 80.00 UG/LBack in compliance
  11. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 115.00 UG/L · limit 80.00 UG/LBack in compliance
  12. 2016-07-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  13. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 128.00 UG/L · limit 80.00 UG/LBack in compliance
  14. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 123.00 UG/L · limit 80.00 UG/LBack in compliance
  15. 2016-03-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  16. 2016-01-01Lead and Copper RuleWater Quality Parameter M/RBack in compliance
  17. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 113.00 UG/L · limit 80.00 UG/LBack in compliance
  18. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 109.00 UG/L · limit 80.00 UG/LBack in compliance
  19. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 102.00 UG/L · limit 80.00 UG/LBack in compliance
  20. 2015-05-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  21. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 123.00 UG/L · limit 80.00 UG/LBack in compliance
  22. 2015-01-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance

System details

Population served400
Service connections27
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityFranklin
EPA ZIP on file70538

Areas served

  • St. Mary Parish

Reading this record

Port of West St Mary is a community water system that draws from groundwater and serves about 400 people in Franklin, 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.