Is Zwolle, LA Tap Water Safe? Quality & Contaminants

What was found in Zwolle'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
Fluoride	4100 µg/L 102% of the EPA limit, in the worst sample — 4000 µg/L	3/5	SYR4
Copper	1200 µg/L 92% of the EPA limit 1300 µg/L	5/5	SYR4
TTHM	307.5 µg/L 384% of the EPA limit, in the worst sample — 80 µg/L	5/5	SYR4
Total Haloacetic Acids (HAA5)	177 µg/L 295% of the EPA limit, in the worst sample — 60 µg/L	5/5	SYR4
Barium	130 µg/L 6.5% of the EPA limit 2000 µg/L	3/5	SYR4
Bromodichloromethane	105.55 µg/L No EPA limit set	5/5	SYR4
Chloroform	103.29 µg/L No EPA limit set	5/5	SYR4
Monochloroacetic Acid	98 µg/L No EPA limit set	4/5	SYR4
Dibromochloromethane	84.82 µg/L No EPA limit set	5/5	SYR4
Nitrate-Nitrite	69 µg/L 0.7% of the EPA limit 10000 µg/L	3/5	SYR4
Dichloroacetic Acid	44 µg/L No EPA limit set	5/5	SYR4
Trichloroacetic Acid	34.6 µg/L No EPA limit set	5/5	SYR4
Bromoform	32.5 µg/L No EPA limit set	5/5	SYR4
Dibromoacetic Acid	24.8 µg/L No EPA limit set	5/5	SYR4
Lead	20 µg/L 133% of the EPA limit, in the worst sample — 15 µg/L	5/5	SYR4
Monobromoacetic Acid	15 µg/L No EPA limit set	4/5	SYR4
Lithium	11.2 µg/L No EPA limit set	1/5	UCMR-5
Gross Beta Particle Activity	5 pCi/L No EPA limit set	3/5	SYR4
Combined Radium (-226 And -228)	1.774 pCi/L 35% of the EPA limit 5 pCi/L	3/5	SYR4
Di(2-ethylhexyl) Phthalate	1.32 µg/L 22% of the EPA limit 6 µg/L	3/5	SYR4
Arsenic	1 µg/L 10% of the EPA limit 10 µg/L	1/5	SYR4
Mercury	1 µg/L 50% of the EPA limit 2 µg/L	1/5	SYR4
Dalapon	0.7200 µg/L 0.4% of the EPA limit 200 µg/L	1/5	SYR4
Lead	0.0015 mg/L 10% of the EPA limit 0.0150 mg/L	5/5	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 Zwolle

Supplier	Population served
EBARB WWKS DIST # 1 - AIMWELL AREA	6,738
TOWN OF ZWOLLE WATER SYSTEM	2,520
EBARB WWKS DIST #1 - NORTH EBARB	1,761
EBARB WWKS DIST # 1 - N EBARB/BELMONT	789
EBARB WWKS DIST #1 - MARSH	54

Frequently asked questions about Zwolle tap water

Is Zwolle tap water safe to drink?

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

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

What contaminants are in Zwolle's water?

The contaminants EPA monitoring detected in Zwolle include Fluoride, Copper, TTHM, Total Haloacetic Acids (HAA5), 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.