Is Little Rock, AR Tap Water Safe? Quality & Contaminants

What was found in Little Rock'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	8940 µg/L 688% of the EPA limit, in the worst sample — 1300 µg/L	2/2	SYR4
Fluoride	950 µg/L 24% of the EPA limit 4000 µg/L	1/2	SYR4
Chlorite	605 µg/L 61% of the EPA limit 1000 µg/L	1/2	SYR4
TTHM	137 µg/L 171% of the EPA limit, in the worst sample — 80 µg/L	2/2	SYR4
Chloroform	129 µg/L No EPA limit set	2/2	SYR4
Lead	116 µg/L 773% of the EPA limit, in the worst sample — 15 µg/L	2/2	SYR4
Nitrate-Nitrite	110 µg/L 1.1% of the EPA limit 10000 µg/L	1/2	SYR4
Total Haloacetic Acids (HAA5)	47.9 µg/L 80% of the EPA limit 60 µg/L	2/2	SYR4
Dichloroacetic Acid	27.8 µg/L No EPA limit set	2/2	SYR4
Trichloroacetic Acid	22.1 µg/L No EPA limit set	2/2	SYR4
Bromodichloromethane	12 µg/L No EPA limit set	2/2	SYR4
Monobromoacetic Acid	5 µg/L No EPA limit set	2/2	SYR4
Monochloroacetic Acid	4.4 µg/L No EPA limit set	2/2	SYR4
Dibromochloromethane	2.8 µg/L No EPA limit set	2/2	SYR4
Dibromoacetic Acid	1.2 µg/L No EPA limit set	1/2	SYR4
Lead	0.1580 mg/L 1053% above the EPA limit of 0.0150 mg/L	2/2	LCR
Benzo(A)Pyrene	0.0600 µg/L 30% of the EPA limit 0.2000 µg/L	1/2	SYR4

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 Little Rock

Supplier	Population served
CENTRAL ARKANSAS WATER	368,455
WYE MOUNTAIN WATER ASSOCIATION	1,963

Frequently asked questions about Little Rock tap water

Is Little Rock tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Little Rock. 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 Little Rock?

2 public water suppliers report drinking-water monitoring for Little Rock, Arkansas to the EPA. Each is listed above with its population served.

What contaminants are in Little Rock's water?

The contaminants EPA monitoring detected in Little Rock include Copper, Fluoride, Chlorite, TTHM, Chloroform. 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.