Is Ponchatoula, LA Tap Water Safe? Quality & Contaminants

What was found in Ponchatoula's water

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

Contaminant	Level vs EPA limit	Suppliers	Source
Copper	500 µg/L 38% of the EPA limit 1300 µg/L	1/3	SYR4
Nitrate-Nitrite	400 µg/L 4% of the EPA limit 10000 µg/L	1/3	SYR4
Fluoride	280 µg/L 7% of the EPA limit 4000 µg/L	2/3	SYR4
Di(2-ethylhexyl) Phthalate	45.63 µg/L 761% of the EPA limit, in the worst sample — 6 µg/L	1/3	SYR4
Barium	29 µg/L 1.5% of the EPA limit 2000 µg/L	1/3	SYR4
Total Haloacetic Acids (HAA5)	28.6 µg/L 48% of the EPA limit 60 µg/L	2/3	SYR4
TTHM	19.1 µg/L 24% of the EPA limit 80 µg/L	2/3	SYR4
Lithium	17.6 µg/L No EPA limit set	1/3	UCMR-5
Trichloroacetic Acid	14.2 µg/L No EPA limit set	2/3	SYR4
Monochloroacetic Acid	11.7 µg/L No EPA limit set	2/3	SYR4
Dichloroacetic Acid	10.2 µg/L No EPA limit set	2/3	SYR4
Chloroform	7.4 µg/L No EPA limit set	2/3	SYR4
Bromodichloromethane	6.4 µg/L No EPA limit set	2/3	SYR4
Dibromochloromethane	5 µg/L No EPA limit set	2/3	SYR4
Lead	5 µg/L 33% of the EPA limit 15 µg/L	2/3	SYR4
Dalapon	3.82 µg/L 1.9% of the EPA limit 200 µg/L	1/3	SYR4
Gross Alpha, Excl. Radon And U	3.26 pCi/L 22% of the EPA limit 15 pCi/L	1/3	SYR4
Dibromoacetic Acid	2.9 µg/L No EPA limit set	2/3	SYR4
Bromoform	1.8 µg/L No EPA limit set	2/3	SYR4
Gross Beta Particle Activity	1.7 pCi/L No EPA limit set	1/3	SYR4
Monobromoacetic Acid	1.3 µg/L No EPA limit set	1/3	SYR4
Combined Radium (-226 And -228)	1.08 pCi/L 22% of the EPA limit 5 pCi/L	1/3	SYR4
Arsenic	0.5600 µg/L 5.6% of the EPA limit 10 µg/L	1/3	SYR4
P-Dichlorobenzene	0.5400 µg/L 0.7% of the EPA limit 75 µg/L	1/3	SYR4
Lead	0.00097 mg/L 6.5% of the EPA limit 0.0150 mg/L	3/3	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 Ponchatoula

Supplier	Population served
CITY OF PONTCHATOULA WATER SYSTEM	6,657
LA CASA LLC	540
WEST YELLOW WATER MH PARK	174

Frequently asked questions about Ponchatoula tap water

Is Ponchatoula tap water safe to drink?

EPA testing detected 25 contaminants in the water serving Ponchatoula. 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 Ponchatoula?

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

What contaminants are in Ponchatoula's water?

The contaminants EPA monitoring detected in Ponchatoula include Copper, Nitrate-Nitrite, Fluoride, Di(2-ethylhexyl) Phthalate, Barium. 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.