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Tap water quality report

Bentonville, AR

EPA monitoring detected 14 contaminants across the 2 water suppliers serving Bentonville. 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.

2
water suppliers
51,383
people served
14
contaminants found
Arkansas rankings Lead in Arkansas PFAS in Arkansas

What was found in Bentonville'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
Copper
88.5 µg/L 6.8%
of the EPA limit 1300 µg/L
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2017
2/2 SYR4
TTHM
74.825 µg/L 94%
of the EPA limit 80 µg/L
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
Highest in the city: 85.395 µg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2019
2/2 SYR4
Chloroform
64.38 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
Highest in the city: 79.635 µg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
49.85 µg/L 83%
of the EPA limit 60 µg/L
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
Highest in the city: 67.87 µg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2019
2/2 SYR4
Dichloroacetic Acid
29.29 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
Highest in the city: 35.33 µg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2019
2/2 SYR4
Trichloroacetic Acid
17.525 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
Highest in the city: 20.555 µg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2019
2/2 SYR4
Lead
11.44 µg/L 76%
of the EPA limit 15 µg/L
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2017
2/2 SYR4
Bromodichloromethane
10.13 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
Highest in the city: 10.51 µg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2019
2/2 SYR4
Monochloroacetic Acid
5.56 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
Highest in the city: 6.8 µg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2019
2/2 SYR4
Dibromochloromethane
2.9 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
2/2 SYR4
Monobromoacetic Acid
1.395 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
2/2 SYR4
Dibromoacetic Acid
1.2 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2019
2/2 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2025
Highest in the city: 0.0110 mg/L — OAKHILLS SURB IMPROVMENT DIST · 133 people · 2003
2/2 LCR
6:2 Fts
0.0062 µg/L
No EPA limit set
Main supplier: BENTONVILLE WATER UTILITIES · 51,250 people · 2024
1/2 UCMR-5
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 Bentonville

SupplierPopulation served
BENTONVILLE WATER UTILITIES 51,250
OAKHILLS SURB IMPROVMENT DIST 133

Frequently asked questions about Bentonville tap water

Is Bentonville tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Bentonville. 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 Bentonville?

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

What contaminants are in Bentonville's water?

The contaminants EPA monitoring detected in Bentonville include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Dichloroacetic Acid. 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.