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Tap water quality report

Stonewall, LA

EPA monitoring detected 24 contaminants across the 1 water supplier serving Stonewall. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
7,608
people served
24
contaminants found
Louisiana rankings Lead in Louisiana PFAS in Louisiana

What was found in Stonewall'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.

ContaminantLevel vs EPA limitSuppliersSource
Copper
800 µg/L 62%
of the EPA limit 1300 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Fluoride
295 µg/L 7.4%
of the EPA limit 4000 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Barium
121 µg/L 6.1%
of the EPA limit 2000 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Nitrate-Nitrite
83 µg/L 0.8%
of the EPA limit 10000 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
TTHM
30.825 µg/L 39%
of the EPA limit 80 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Lithium
23.3 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2024
1/1 UCMR-5
Total Haloacetic Acids (HAA5)
15.105 µg/L 25%
of the EPA limit 60 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Dibromochloromethane
12.635 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Monobromoacetic Acid
8.6255 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Bromodichloromethane
7.922 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Dichloroacetic Acid
7.725 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Bromoform
7.6785 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Dibromoacetic Acid
5.102 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Chloroform
4.9 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
4.135 pCi/L 28%
of the EPA limit 15 pCi/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Gross Beta Particle Activity
3.84 pCi/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Trichloroacetic Acid
3.8 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.765 µg/L
No EPA limit set
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Lead
3.6 µg/L 24%
of the EPA limit 15 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.7456 pCi/L 35%
of the EPA limit 5 pCi/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
0.7070 µg/L 12%
of the EPA limit 6 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Adipate
0.5600 µg/L 0.1%
of the EPA limit 400 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Mercury
0.2495 µg/L 12%
of the EPA limit 2 µg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2019
1/1 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: NORTH DESOTO WATER SYSTEM · 7,608 people · 2025
1/1 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 Stonewall

SupplierPopulation served
NORTH DESOTO WATER SYSTEM 7,608

Frequently asked questions about Stonewall tap water

Is Stonewall tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Stonewall. 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 Stonewall?

1 public water supplier report drinking-water monitoring for Stonewall, Louisiana to the EPA. Each is listed above with its population served.

What contaminants are in Stonewall's water?

The contaminants EPA monitoring detected in Stonewall include Copper, Fluoride, Barium, Nitrate-Nitrite, TTHM. 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.