Is Monroe, LA tap water safe?
The short answer
6 of the 7 utilities serving Monroe have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Gowc South Monroe WS, City of Monroe Water System, Magnolia - Town & Country Service and 3 more.
Gowc South Monroe WS, which serves the most people here, has 1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 55 ppb, above the legal limit.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Monroe’s ZIP codes, from EPA’s estimates.
- Open report
Gowc South Monroe WS
Louisiana · serves 7,335 people · nearly all in Monroe
1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 55 ppb, above the legal limit.
12 health-based violations since 2016
- Open report
City of Monroe Water System
Louisiana · serves 57,000 people · about 8,600 in Monroe
Nothing in its records is above a health goal.
6 health-based violations since 2016
- Open report
Gowc East Water System
Louisiana · serves 11,742 people · about 830 in Monroe
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 16.8 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Magnolia - Town & Country Service
Louisiana · serves 5,715 people · about 770 in Monroe
1 result above the legal limit. The worst: Haloacetic acids (HAA5) at 39.1 ppb, above the legal limit.
1 health-based violation since 2016
- Open report
L&R North Water System
Louisiana · serves 1,293 people · about 250 in Monroe
1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 179 ppb, above the legal limit.
24 health-based violations since 2016
- Open report
Better Waterworks Water System
Louisiana · serves 2,160 people · about 110 in Monroe
1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 85.2 ppb, above the legal limit.
23 health-based violations since 2016
- Open report
Prairie Road Water District
Louisiana · serves 2,598 people · under 100 in Monroe
1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 100 ppb, above the legal limit.
26 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Gowc South Monroe WS’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM), Lead, Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM), Lead, Arsenic
Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Total trihalomethanes (TTHM), Lead, Arsenic
Water testing near Monroe
No lab Louisiana certifies is within 75 miles of Monroe on the state’s list. Some take samples by mail; the state’s page lists them all.
All 48 certified labs for LouisianaWhich ZIP codes are in Monroe: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology.
Near Monroe
Towns nearby with a page of their own.
What to do next
- Read Gowc South Monroe WS’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About Total trihalomethanes (TTHM)What it does to health, where it comes from, and the certification claim that addresses it.About Total trihalomethanes (TTHM)
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water