City of Monroe Water System water quality report, rewritten
- Serves
- 57,000
- Connections
- 19,000
- Water source
- Surface water
- Based in
- Monroe, LA
- County
- Ouachita Parish
- Owner
- Local government
PWSID LA1073031 · EPA data
Read this first
Nothing in the federal data for this utility is above a health goal. That covers PFAS, lithium, lead and copper; it does not cover everything, so read what this report cannot tell you below.
6 health-based violations since 2016. Details are below.
What was found
Highlighted: above the health goal, or EPA’s health benchmark where there is no goal. Circled: above the legal limit in at least one sample, or the action level. Every scale puts that line at its middle.
Also found, with no federal limit
EPA measured these PFAS to learn how often they occur. None has a legal limit or a health goal yet.
| Compound | Highest sample | Found in | Certification claim |
|---|---|---|---|
| PFBA | 8.2 ppt | 2 of 4 | None covers it |
Tested and not found
Below EPA’s minimum reporting level in every sample taken from Nov. 7, 2023 to Aug. 15, 2024. Not found means not measured above that level, which is not the same as zero.
All 30 compounds tested and not found
- 11Cl-PF3OUdS
- 4:2 FTS
- 6:2 FTS
- 8:2 FTS
- 9Cl-PF3ONS
- ADONA
- HFPO-DA (GenX)
- Lead
- Lithium
- NEtFOSAA
- NFDHA
- NMeFOSAA
- PFBS
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxA
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOA
- PFOS
- PFPeA
- PFPeS
- PFTA
- PFTrDA
- PFUnA
Violations since 2016
| Contaminant or rule | Type | Period | Measured | Status |
|---|---|---|---|---|
| Long Term 2 Enhanced Surface Water Treatment Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | Jan. 1, 2026 to Jan. 31, 2026 | — | Archived |
| Interim Enhanced Surface Water Treatment Rule | Too many readings in a month showed cloudiness above the filtration standard.EPA: Monthly Turbidity Exceed (Enhanced SWTR) | Jan. 1, 2026 to Jan. 31, 2026 | — | Resolved |
| Interim Enhanced Surface Water Treatment Rule | One cloudiness reading was above the maximum allowed.EPA: Single Turbidity Exceed (Enhanced SWTR) | Jan. 1, 2026 to Jan. 31, 2026 | — | Archived |
| Lead and Copper Rule Revisions | The required inventory of lead service lines was not completed or submitted on time.EPA: LSL Inventory | Oct. 17, 2024 | — | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | July 1, 2019 to Sept. 30, 2019 | 0.063 MG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | April 1, 2019 to June 30, 2019 | 0.062 MG/L | Resolved |
| Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. | ||||
What this report cannot tell you
- Levels of everything else. Federal bulk data carries results for PFAS, lithium, lead and copper, and violations for the rest. Nitrate, arsenic, disinfection byproducts and other levels are in City of Monroe Water System’s own annual report, which it must send you every year.
- Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
- Anything after the latest data. SDWIS data is from 2026 Q2; UCMR 5 samples are from Nov. 7, 2023 to Aug. 15, 2024.
Other Louisiana utilities
- Baton Rouge Water Company596,844
- New Orleans Carrollton Water Works334,903
- E Jefferson Ww District 1275,163
- City of Shreveport Water System192,378
- Lafayette Utilities Water System169,389
- W Jefferson Ww District 2140,264
- Schriever Water Treatment Service Area116,460
- Lafourche Water District 181,609
- City of Bossier City Water System79,506
- City of Lake Charles Water System79,500
- Ward II Water District78,147
- Tangipahoa Parish Water District75,873
Sources
- EPA UCMR 5 occurrence data, file of Aug. 27, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q2
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
What to do next
Nothing here is above a health goal
In the federal data for this utility. That data does not cover everything, which is why the next step matters.
Every contaminant TapBuff tracksGet the utility’s own report
City of Monroe Water System must send you a water quality report every year. It lists nitrate, arsenic and byproduct levels this page cannot.
How to read itTest your own tap for lead
Your service line, solder and fixtures decide the lead at your faucet, not the utility’s average.
Lead in your water: what to doDecide if you want a filter at all
A filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.
NSF/ANSI standards, decoded