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Tap water quality report

Monroe, LA

EPA monitoring detected 27 contaminants across the 2 water suppliers serving Monroe. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
59,598
people served
27
contaminants found
Louisiana rankings Lead in Louisiana PFAS in Louisiana

What was found in Monroe's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
1200 µg/L 92%
of the EPA limit 1300 µg/L
 2/2 SYR4
Fluoride
720 µg/L 18%
of the EPA limit 4000 µg/L
 2/2 SYR4
Nitrate-Nitrite
190 µg/L 1.9%
of the EPA limit 10000 µg/L
 1/2 SYR4
TTHM
162.64 µg/L 203%
of the EPA limit, in the worst sample — 80 µg/L
 2/2 SYR4
Chloroform
146 µg/L
No EPA limit set
 2/2 SYR4
Total Haloacetic Acids (HAA5)
120.4 µg/L 201%
of the EPA limit, in the worst sample — 60 µg/L
 2/2 SYR4
Bromoform
88.8 µg/L
No EPA limit set
 1/2 SYR4
Dichloroacetic Acid
69.4 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
58.9 µg/L
No EPA limit set
 2/2 SYR4
Dibromochloromethane
46.8 µg/L
No EPA limit set
 2/2 SYR4
Lead
28 µg/L 187%
of the EPA limit, in the worst sample — 15 µg/L
 2/2 SYR4
Barium
26 µg/L 1.3%
of the EPA limit 2000 µg/L
 2/2 SYR4
Dibromoacetic Acid
22.6 µg/L
No EPA limit set
 2/2 SYR4
Monochloroacetic Acid
19.3 µg/L
No EPA limit set
 2/2 SYR4
Bromodichloromethane
15.5 µg/L
No EPA limit set
 2/2 SYR4
Monobromoacetic Acid
12.1 µg/L
No EPA limit set
 2/2 SYR4
Dalapon
9.136 µg/L 4.6%
of the EPA limit 200 µg/L
 2/2 SYR4
Gross Beta Particle Activity
4 pCi/L
No EPA limit set
 2/2 SYR4
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
 2/2 SYR4
Combined Radium (-226 And -228)
2.64 pCi/L 53%
of the EPA limit 5 pCi/L
 1/2 SYR4
Atrazine
1.13 µg/L 38%
of the EPA limit 3 µg/L
 1/2 SYR4
Di(2-ethylhexyl) Phthalate
1 µg/L 17%
of the EPA limit 6 µg/L
 2/2 SYR4
Mercury
1 µg/L 50%
of the EPA limit 2 µg/L
 1/2 SYR4
Carbon Tetrachloride
0.9800 µg/L 20%
of the EPA limit 5 µg/L
 1/2 SYR4
Hexachlorocyclopentadiene
0.0670 µg/L 0.1%
of the EPA limit 50 µg/L
 1/2 SYR4
Pfba
0.0082 µg/L
No EPA limit set
 1/2 UCMR-5
Lead
0.0023 mg/L 15%
of the EPA limit 0.0150 mg/L
 2/2 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 single worst sample on record — 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 Monroe

SupplierPopulation served
CITY OF MONROE WATER SYSTEM 57,000
PRAIRIE ROAD WATER DISTRICT 2,598

Frequently asked questions about Monroe tap water

Is Monroe tap water safe to drink?

EPA testing detected 27 contaminants in the water serving 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 Monroe?

2 public water suppliers report drinking-water monitoring for Monroe, Louisiana to the EPA. Each is listed above with its population served.

What contaminants are in Monroe's water?

The contaminants EPA monitoring detected in Monroe include Copper, Fluoride, Nitrate-Nitrite, TTHM, Chloroform. The full list, with the highest level found 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.