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Tap water quality report

St Joseph, LA

EPA monitoring detected 29 contaminants across the 2 water suppliers serving St Joseph. 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
5,175
people served
29
contaminants found
Louisiana rankings Lead in Louisiana PFAS in Louisiana

What was found in St Joseph'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
3300 µg/L 254%
of the EPA limit, in the worst sample — 1300 µg/L
 2/2 SYR4
Barium
1000 µg/L 50%
of the EPA limit 2000 µg/L
 2/2 SYR4
Nitrate-Nitrite
1000 µg/L 10%
of the EPA limit 10000 µg/L
 2/2 SYR4
Fluoride
370 µg/L 9.3%
of the EPA limit 4000 µg/L
 2/2 SYR4
Lead
257 µg/L 1713%
of the EPA limit, in the worst sample — 15 µg/L
 2/2 SYR4
TTHM
181.1 µg/L 226%
of the EPA limit, in the worst sample — 80 µg/L
 2/2 SYR4
Chloroform
122 µg/L
No EPA limit set
 2/2 SYR4
Total Haloacetic Acids (HAA5)
92.5 µg/L 154%
of the EPA limit, in the worst sample — 60 µg/L
 2/2 SYR4
Dalapon
80.36 µg/L 40%
of the EPA limit 200 µg/L
 2/2 SYR4
Trichloroacetic Acid
53.7 µg/L
No EPA limit set
 2/2 SYR4
Dichloroacetic Acid
47 µg/L
No EPA limit set
 2/2 SYR4
Bromodichloromethane
44.4 µg/L
No EPA limit set
 2/2 SYR4
Dibromochloromethane
16.6 µg/L
No EPA limit set
 2/2 SYR4
Arsenic
15 µg/L 150%
of the EPA limit, in the worst sample — 10 µg/L
 2/2 SYR4
Monobromoacetic Acid
13 µg/L
No EPA limit set
 2/2 SYR4
Monochloroacetic Acid
12 µg/L
No EPA limit set
 2/2 SYR4
Gross Beta Particle Activity
6.06 pCi/L
No EPA limit set
 2/2 SYR4
Dibromoacetic Acid
3.4 µg/L
No EPA limit set
 2/2 SYR4
Gross Alpha, Excl. Radon And U
3.34 pCi/L 22%
of the EPA limit 15 pCi/L
 1/2 SYR4
Combined Radium (-226 And -228)
2.38 pCi/L 48%
of the EPA limit 5 pCi/L
 1/2 SYR4
Atrazine
1.81 µg/L 60%
of the EPA limit 3 µg/L
 1/2 SYR4
Bromoform
1.4 µg/L
No EPA limit set
 2/2 SYR4
Di(2-ethylhexyl) Phthalate
1.08 µg/L 18%
of the EPA limit 6 µg/L
 2/2 SYR4
Antimony, Total
0.7400 µg/L 12%
of the EPA limit 6 µg/L
 1/2 SYR4
Selenium
0.7300 µg/L 1.5%
of the EPA limit 50 µg/L
 1/2 SYR4
2,4-D
0.1500 µg/L 0.2%
of the EPA limit 70 µg/L
 1/2 SYR4
Pfba
0.0063 µg/L
No EPA limit set
 1/2 UCMR-5
Bhc-Gamma
0.0062 µg/L 3.1%
of the EPA limit 0.2000 µg/L
 1/2 SYR4
Lead
0.0030 mg/L 20%
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 St Joseph

SupplierPopulation served
TENSAS WATER DISTRICT ASSOCIATION 3,843
TOWN OF ST JOSEPH WATER SYSTEM 1,332

Frequently asked questions about St Joseph tap water

Is St Joseph tap water safe to drink?

EPA testing detected 29 contaminants in the water serving St Joseph. 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 St Joseph?

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

What contaminants are in St Joseph's water?

The contaminants EPA monitoring detected in St Joseph include Copper, Barium, Nitrate-Nitrite, Fluoride, Lead. 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.