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Updated 2026-10-15
County water report

Benton County Water Quality: 6 Cities Ranked by the Records

Benton County, Arkansas: 6 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Benton County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Lead (90th percentile)Detected in 6 systems15 µg/L federal action level · US EPAHighest1.7 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 6 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest7 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 6 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest3.8 ng/L
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)Detected in 1 system of 6 testedNo federal or state limit; shown for transparencyHighest6.2 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 6 testedNo federal or state limit; shown for transparencyHighest5.5 ng/L
26 substances tested, none detected in any systemShow

Tested in these 6 systems: BELLA VISTA POA, BENTONVILLE WATER UTILITIES, CENTERTON WATERWORKS, PEA RIDGE WATERWORKS, ROGERS WATER UTILITIES, SILOAM SPRINGS WATERWORKS

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • Lithium
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorobutanoic acid (PFBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluoroheptanoic acid (PFHpA)
  • Perfluorohexanesulfonic acid (PFHxS)
  • Perfluorononanoic acid (PFNA)
  • Perfluorooctanesulfonic acid (PFOS)
  • Perfluorooctanoic acid (PFOA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
6 cities

Cities ranked by the records

Showing 6 of 6 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Benton CountyPFAS detected in 2 of 6 cities; none had a sample above a 2024 EPA limit
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Arkansas
Lead

0of 6 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Arkansas
Who supplies the county

Largest water systems

  1. RogersROGERS WATER UTILITIES · AR0000055
    81,443 served
  2. BentonvilleBENTONVILLE WATER UTILITIES · AR0000041
    51,250 served
  3. Bella VistaBELLA VISTA POA · AR0000039
    39,419 served
  4. CentertonCENTERTON WATERWORKS · AR0000044
    27,243 served
  5. Siloam SpringsSILOAM SPRINGS WATERWORKS · AR0000056
    23,940 served
  6. Pea RidgePEA RIDGE WATERWORKS · AR0000053
    12,795 served
Questions

Frequently asked

How does Benton County tap water compare across cities?

PurityMap ranks 6 cities in Benton County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Rogers's main water system: ROGERS WATER UTILITIES · PWSID AR0000055 · Purity Score 99 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Benton County cities had a PFAS sample above a 2024 EPA limit?

None of the 6 Benton County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 2.

Is there lead in Benton County tap water?

Utilities report lead as a 90th-percentile result from home taps. 6 of 6 Benton County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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