Is Monroe, LA tap water safe?
Supplied by City of Monroe Water System · serves 57,000 people (19,000 connections) · Surface water · EPA ID LA1073031
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit1 of 29 PFAS found at least once. All averages below the federal limits.
- Lead
- Below action level0 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Dec 2025. Your home's pipes can make yours higher.
- Violations
- Resolved6 health-based violations since 2016, most recently Jan 2026. 2 required an urgent public notice within 24 hours (the kind behind boil-water notices), most recently Jan 2026. What to do if you get a notice.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Got a boil-water or do-not-drink notice? What each notice means and what to do.
- Want to reduce what was found? Filters for these results.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read City of Monroe Water System's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (318) 329-2310. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 1 entry point tested Nov 2023 to Aug 2024. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Not detected Guideline 2,000 ppt | – |
| PFBA Detected, below limit Guideline 6,000 ppt | 3.45 ppt |
| PFHxA Not detected Guideline 3,000 ppt | – |
29 PFAS tested, 1 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Not detected in 4 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 0 ppb lead (Jan 2023 – Dec 2025). Below action level
Highest since 2016: 3 ppb (Dec 2019).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2023 – Dec 2025 | 0 ppb |
| Jan 2020 – Dec 2022 | 2 ppb |
| Jan 2017 – Dec 2019 | 3 ppb |
Earlier results (8)
| Jan 2014 – Dec 2016 | 2 ppb |
| Jan 2011 – Dec 2013 | 4 ppb |
| Jan 2008 – Dec 2010 | 2 ppb |
| Jan 2005 – Dec 2007 | 3 ppb |
| Jan 2002 – Dec 2004 | 2 ppb |
| Jan 1999 – Dec 2001 | 1 ppb |
| Jul 1992 – Dec 1992 | 3 ppb |
| Jan 1992 – Jun 1992 | 5 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
| When | What happened |
|---|---|
| Jan 2026 | The water was too cloudy too often in a month. Cloudiness can shield germs from disinfection. Urgent public notice required What that means EPA record: Interim Enhanced Surface Water Treatment Rule · Monthly Turbidity Exceed (Enhanced SWTR) (limit ) Resolved |
| Jan 2026 | The water was cloudier than allowed at least once. Cloudiness can shield germs from disinfection. Urgent public notice required What that means EPA record: Interim Enhanced Surface Water Treatment Rule · Single Turbidity Exceed (Enhanced SWTR) (limit ) Archived |
| Jan 2026 | A required step to remove or kill germs (filtration, disinfection or fixing a contaminated well) was not done properly. EPA record: Long Term 2 Enhanced Surface Water Treatment Rule · Treatment Technique (SWTR and GWR) (limit ) Resolved |
| Oct 2024 | The system did not publish the required inventory of lead service lines (due October 2024). It says nothing about lead levels in the water. EPA record: Lead and copper rule revisions · LSL Inventory Resolved |
| Apr 2019 – Jul 2019 2 times | The running annual average for Total Haloacetic Acids (HAA5) was above the legal limit. EPA record: Total Haloacetic Acids (HAA5) · Maximum Contaminant Level Violation, Average · measured 0.063 mg/l (limit 0.060 mg/L) Resolved |
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 67.4 ppb | 300 ppb |
| Chromium-6 | 0.2 ppb | – |
| Chlorate | 70 ppb | 210 ppb |
| Vanadium | 0.4 ppb | 21 ppb |
| Strontium | 0.064 ppm | 1.5 ppm |
Where it serves
Monroe
ZIP codes the system reported serving: 71201, 71202, 71203
Nearby utilities
- Town of Vidalia Water System Vidalia · 75 mi · PFAS above limit
- City of Alexandria Water System Alexandria · 88 mi
- City of Bossier City Water System Bossier City · 92 mi
- City of Shreveport Water System Shreveport · 100 mi
- Tangipahoa Parish Water District Tangipahoa · 145 mi
- Baton Rouge Water Company Baton Rouge · 154 mi
Questions
Is Monroe tap water safe to drink?
Most of Monroe gets its water from City of Monroe Water System. City of Monroe Water System had 6 health-based violations since 2016, all since resolved. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Monroe water have PFAS?
Yes. EPA's 2023–2025 testing of City of Monroe Water System found 1 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Monroe water?
The most recent 90th-percentile lead result for City of Monroe Water System is 0 ppb, for the period ending Dec 2025. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for LA1073031: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID LA1073031).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask City of Monroe Water System at (318) 329-2310, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.