Community Water System · PWSID LA1073056

West Monroe Water System

Serves 16,005 peopleGroundwaterOwner: Local GovernmentWest Monroe, Louisiana
Nothing open right now.

On record since 2009: 22 violations. 7 over the limit · 7 treatment lapses · 7 missed or late tests · 1 notice or report. Most recent began 2023-04-01.

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

7Over the limit
7Treatment lapse
7Missed or late test
1Notice or report

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

20052009 · Missed or late test: 42009 · Missed or late test: 42009 · Missed or late test: 42009 · Missed or late test: 420102013 · Over the limit: 12013 · Missed or late test: 12014 · Over the limit: 12014 · Missed or late test: 22014 · Missed or late test: 220152016 · Over the limit: 12017 · Over the limit: 32017 · Over the limit: 32017 · Over the limit: 32020 · Treatment lapse: 32020 · Treatment lapse: 32020 · Treatment lapse: 32020 · Notice or report: 120202023 · Over the limit: 12023 · Treatment lapse: 42023 · Treatment lapse: 42023 · Treatment lapse: 42023 · Treatment lapse: 42025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
32% over the limit · 732% treatment lapse · 732% missed or late test · 75% notice or report · 1

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)2023-04-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2017-07-01 · Trihalomethanes (TTHM): measured 83.00 UG/L vs limit 80.00 UG/L (1.0×)2017-04-01 · Trihalomethanes (TTHM): measured 82.00 UG/L vs limit 80.00 UG/L (1.0×)2017-01-01 · Trihalomethanes (TTHM): measured 84.00 UG/L vs limit 80.00 UG/L (1.1×)2016-10-01 · Trihalomethanes (TTHM): measured 84.00 UG/L vs limit 80.00 UG/L (1.1×)2014-01-01 · Trihalomethanes (TTHM): measured 84.00 UG/L vs limit 80.00 UG/L (1.1×)2013-10-01 · 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 3 results on file · action level 15 ppb

9 ppb
2 ppb
1 ppb

Every violation on record

  1. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  2. 2023-02-14Groundwater Rule ×4Failure To Address DeficiencyBack in compliance
  3. 2020-04-15Public NoticePN Violation for NPDWR ViolationBack in compliance
  4. 2020-02-24Groundwater Rule ×3Failure To Address DeficiencyBack in compliance
  5. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 83.00 UG/L · limit 80.00 UG/LBack in compliance
  6. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 82.00 UG/L · limit 80.00 UG/LBack in compliance
  7. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 84.00 UG/L · limit 80.00 UG/LBack in compliance
  8. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 84.00 UG/L · limit 80.00 UG/LBack in compliance
  9. 2014-05-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  10. 2014-01-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  11. 2014-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 84.00 UG/L · limit 80.00 UG/LBack in compliance
  12. 2013-10-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  13. 2013-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 87.00 UG/L · limit 80.00 UG/LBack in compliance
  14. 2009-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  15. 2009-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  16. 2009-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  17. 2009-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance

System details

Population served16,005
Service connections5,335
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWest Monroe
EPA ZIP on file71292

Areas served

  • Ouachita Parish

Reading this record

West Monroe Water System is a community water system that draws from groundwater and serves about 16,005 people in West Monroe, 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.