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Tap water quality report

Leonville, LA

EPA monitoring detected 21 contaminants across the 1 water supplier serving Leonville. 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
9,552
people served
21
contaminants found
Louisiana rankings Lead in Louisiana PFAS in Louisiana

What was found in Leonville'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
Barium
426 µg/L 21%
of the EPA limit 2000 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2018
1/1 SYR4
Copper
400 µg/L 31%
of the EPA limit 1300 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Fluoride
396.49999999999994 µg/L 9.9%
of the EPA limit 4000 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2018
1/1 SYR4
Nitrate-Nitrite
45 µg/L 0.5%
of the EPA limit 10000 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Lithium
43.8 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2024
1/1 UCMR-5
TTHM
14.889999999999997 µg/L 19%
of the EPA limit 80 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
6.459999999999999 µg/L 11%
of the EPA limit 60 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Dibromochloromethane
5.549999999999999 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Bromodichloromethane
4.639999999999999 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Chloroform
4.245 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Lead
4 µg/L 27%
of the EPA limit 15 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Gross Beta Particle Activity
3.76 pCi/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2018
1/1 SYR4
Monobromoacetic Acid
2.42 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Dibromoacetic Acid
2.4 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Trichloroacetic Acid
2.35 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Dichloroacetic Acid
2.1599999999999997 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Bromoform
1.67 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
0.9474 pCi/L 19%
of the EPA limit 5 pCi/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2018
1/1 SYR4
Monochloroacetic Acid
0.7845 µg/L
No EPA limit set
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
0.5500 µg/L 9.2%
of the EPA limit 6 µg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 people · 2018
1/1 SYR4
Lead
0.0025 mg/L 17%
of the EPA limit 0.0150 mg/L
Main supplier: TOWN OF LEONVILLE WATER SYSTEM · 9,552 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 Leonville

SupplierPopulation served
TOWN OF LEONVILLE WATER SYSTEM 9,552

Frequently asked questions about Leonville tap water

Is Leonville tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Leonville. 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 Leonville?

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

What contaminants are in Leonville's water?

The contaminants EPA monitoring detected in Leonville include Barium, Copper, Fluoride, Nitrate-Nitrite, Lithium. 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.