What was found in West Monroe's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 592 µg/L 15% of the EPA limit 4000 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 1600 µg/L — SOUTHWEST OUACHITA WATERWORKS, INC · 10,725 people · 2017 | 12/19 | SYR4 |
| Copper | 300 µg/L 23% of the EPA limit 1300 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 800 µg/L — BROWNVILLE WATER SYSTEM · 9,696 people · 2017 | 17/19 | SYR4 |
| Nitrate-Nitrite | 570 µg/L 5.7% of the EPA limit 10000 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019 | 9/19 | SYR4 |
| TTHM | 88.18 µg/L 110% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 449.38 µg/L — WILDWOOD MHP WS · 30 people · 2019 | 17/19 | SYR4 |
| Bromoform | 43.09 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 278.25 µg/L — WILDWOOD MHP WS · 30 people · 2019 | 17/19 | SYR4 |
| Dibromochloromethane | 28.45 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 168 µg/L — HIDDEN OAKS SUBDIVISION WS · 438 people · 2019 | 17/19 | SYR4 |
| Chloroform | 6.8 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 142.4 µg/L — HIDDEN OAKS SUBDIVISION WS · 438 people · 2019 | 17/19 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26.35 µg/L 44% of the EPA limit 60 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 114.325 µg/L — HIDDEN OAKS SUBDIVISION WS · 438 people · 2019 | 17/19 | SYR4 |
| Bromodichloromethane | 12.325 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 98.385 µg/L — SOUTHWEST OUACHITA WATERWORKS, INC · 10,725 people · 2019 | 17/19 | SYR4 |
| Dibromoacetic Acid | 15.13 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 80.215 µg/L — HIDDEN OAKS SUBDIVISION WS · 438 people · 2019 | 17/19 | SYR4 |
| Dichloroacetic Acid | 6.09 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 74.26 µg/L — HIDDEN OAKS SUBDIVISION WS · 438 people · 2019 | 17/19 | SYR4 |
| Trichloroacetic Acid | 3.8 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 35.45 µg/L — SOUTHWEST OUACHITA WATERWORKS, INC · 10,725 people · 2019 | 17/19 | SYR4 |
| Monobromoacetic Acid | 2.4 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 33.205 µg/L — CADEVILLE WATER DISTRICT · 6,219 people · 2019 | 15/19 | SYR4 |
| Barium | 12.34 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 24.2 µg/L — BROWNVILLE WATER SYSTEM · 9,696 people · 2017 | 11/19 | SYR4 |
| Lithium | 10.6 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2024
Highest in the city: 16.8 µg/L — GOWC EAST WATER SYSTEM · 11,742 people · 2025 | 8/19 | UCMR-5 |
| Lead | 8 µg/L 53% of the EPA limit 15 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 14.75 µg/L — BROWNVILLE WATER SYSTEM · 9,696 people · 2017 | 17/19 | SYR4 |
| Monochloroacetic Acid | 5.8 µg/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2019
Highest in the city: 10.075 µg/L — BETTER WATERWORKS WATER SYSTEM · 2,160 people · 2019 | 16/19 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Highest in the city: BROWNVILLE WATER SYSTEM · 9,696 people · 2017 | 1/19 | SYR4 |
| Dalapon | 9.039 µg/L 4.5% of the EPA limit 200 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 9.136 µg/L — MCCLENDON COMMUNITY WATER WELL · 336 people · 2019 | 9/19 | SYR4 |
| Antimony, Total | 5.53 µg/L 92% of the EPA limit 6 µg/L Highest in the city: BROWNVILLE WATER SYSTEM · 9,696 people · 2018 | 2/19 | SYR4 |
| Gross Beta Particle Activity | 1.4925 pCi/L No EPA limit set Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 4.45 pCi/L — KIROLI DARBONNE WS · 9,210 people · 2017 | 8/19 | SYR4 |
| Cyanide | 3.5 µg/L 1.8% of the EPA limit 200 µg/L Highest in the city: BETTER WATERWORKS WATER SYSTEM · 2,160 people · 2019 | 1/19 | SYR4 |
| Beryllium, Total | 3 µg/L 75% of the EPA limit 4 µg/L Highest in the city: WEST HWY 80 ARK ROAD WS · 14,649 people · 2018 | 1/19 | SYR4 |
| Selenium | 3 µg/L 6% of the EPA limit 50 µg/L Highest in the city: BROWNVILLE WATER SYSTEM · 9,696 people · 2017 | 1/19 | SYR4 |
| Xylenes, Total | 2.7455 µg/L 0% of the EPA limit 10000 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 3 µg/L — WEST HWY 80 ARK ROAD WS · 14,649 people · 2017 | 2/19 | SYR4 |
| Ethylbenzene | 2 µg/L 0.3% of the EPA limit 700 µg/L Highest in the city: WEST HWY 80 ARK ROAD WS · 14,649 people · 2017 | 1/19 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.312 µg/L 22% of the EPA limit 6 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 1.785 µg/L — SOUTH MONROE WS GOWC · 7,335 people · 2018 | 11/19 | SYR4 |
| 1,2-Dichloroethane | 1.6 µg/L 32% of the EPA limit 5 µg/L Highest in the city: BETTER WATERWORKS WATER SYSTEM · 2,160 people · 2019 | 1/19 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 1.475 µg/L — BETTER WATERWORKS WATER SYSTEM · 2,160 people · 2019 | 8/19 | SYR4 |
| Combined Radium (-226 And -228) | 0.9920 pCi/L 20% of the EPA limit 5 pCi/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2018
Highest in the city: 1.45745 pCi/L — WEST HWY 80 ARK ROAD WS · 14,649 people · 2017 | 8/19 | SYR4 |
| Toluene | 1.1 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: KIROLI DARBONNE WS · 9,210 people · 2017 | 2/19 | SYR4 |
| P-Dichlorobenzene | 1.1 µg/L 1.5% of the EPA limit 75 µg/L Highest in the city: MCCLENDON COMMUNITY WATER WELL · 336 people · 2019 | 1/19 | SYR4 |
| Tetrachloroethylene | 0.5400 µg/L 11% of the EPA limit 5 µg/L Highest in the city: CHENIERE DREW NORTH WATER SYSTEM · 11,280 people · 2017 | 1/19 | SYR4 |
| Mercury | 0.1200 µg/L 6% of the EPA limit 2 µg/L Highest in the city: WEST HWY 80 ARK ROAD WS · 14,649 people · 2017 | 1/19 | SYR4 |
| Pentachlorophenol | 0.0600 µg/L 6% of the EPA limit 1 µg/L Highest in the city: KIROLI DARBONNE WS · 9,210 people · 2017 | 2/19 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: WEST MONROE WATER SYSTEM · 16,005 people · 2023
Highest in the city: 0.0067 mg/L — CHENIERE DREW SOUTH WATER SYSTEM · 1,563 people · 2025 | 19/19 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving West Monroe
| Supplier | Population served |
|---|---|
| WEST MONROE WATER SYSTEM | 16,005 |
| WEST HWY 80 ARK ROAD WS | 14,649 |
| GOWC NORTH WATER SYSTEM | 13,287 |
| GOWC EAST WATER SYSTEM | 11,742 |
| CHENIERE DREW NORTH WATER SYSTEM | 11,280 |
| SOUTHWEST OUACHITA WATERWORKS, INC | 10,725 |
| BROWNVILLE WATER SYSTEM | 9,696 |
| KIROLI DARBONNE WS | 9,210 |
| SOUTH MONROE WS GOWC | 7,335 |
| CADEVILLE WATER DISTRICT | 6,219 |
| BETTER WATERWORKS WATER SYSTEM | 2,160 |
| CHENIERE DREW SOUTH WATER SYSTEM | 1,563 |
| L&R NORTH WATER SYSTEM | 1,293 |
| LINCOLN HILLS SUBDIVISION WS | 552 |
| HIDDEN OAKS SUBDIVISION WS | 438 |
| MCCLENDON COMMUNITY WATER WELL | 336 |
| RAMSEY WATER SYSTEM | 84 |
| PECAN LAKE SUBDIVISION WS | 57 |
| WILDWOOD MHP WS | 30 |
Frequently asked questions about West Monroe tap water
Is West Monroe tap water safe to drink?
EPA testing detected 36 contaminants in the water serving West Monroe. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve West Monroe?
19 public water suppliers report drinking-water monitoring for West Monroe, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in West Monroe's water?
The contaminants EPA monitoring detected in West Monroe include Fluoride, Copper, Nitrate-Nitrite, TTHM, Bromoform. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.