waterbycounty
Compiled federal source snapshot

Arkansas Water Quality

Drinking water data for all 75 counties.

Avg SDWIS Compliance Index

46.4

Most Common Five-Year SDWIS Compliance Band

F

Counties with Data

75

of 75 total

County water atlas

Arkansas water signals by county

A state-level 2.5D view across drinking-water compliance, watershed impairment, monitoring density, and streamflow snapshot context. Pin any county, switch layers, then use the lens controls to compare index ranges, recorded violation rates, or impaired watersheds without leaving the page.

Counties

75

Avg SDWIS index

46.4

Watersheds

75

ATTAINS counties

Monitoring

75

44 fresh USGS snapshots

State atlas layers combine EPA SDWIS health-based violations, EPA ATTAINS 303(d) impairment assessments, EPA Water Quality Portal monitoring sites, and representative USGS NWIS streamflow gauges. Streamflow values appear only for fresh pipeline snapshots, not as a continuously updated stream. County pages include the observation time and year.

Prepared by ByCounty Editorial TeamPublished by WaterByCounty

Multi-source coverage in Arkansas

Beyond Drinking Water

EPA SDWIS

75/ 75

counties with drinking-water compliance data

629 health violations statewide (5yr)

EPA ATTAINS

33.0%

avg impaired across 75 counties

3,742 of 11,488 assessed bodies impaired

EPA WQP

1,097

monitoring sites across 75 counties

666,690 total readings (5yr window)

USGS NWIS

44

counties with a fresh pipeline snapshot

1 above42 below

State atlas notes

What stands out in Arkansas

County water quality is not one number. The strongest read comes from comparing drinking-water compliance against watershed impairment, monitoring density, and streamflow context. Use these signals as a starting point, then open any county profile for source-level detail.

Compliance spread

Bradley County has the highest value in the published state SDWIS Compliance Index table at 86.2/100, while Montgomery County has the lowest at 2.1/100. That is a 84.1 point gap inside one state.

Zero health violations

20

3+ health violations

38

Watershed pressure

The atlas impairment layer points to counties where assessed water bodies are most likely to miss state quality standards. Assessment density varies, so compare the percentage with the number of assessed bodies on the county page.

Bradley County76.3%Union County73.7%Columbia County65.5%

Monitoring hubs

Washington County53 sitesSearcy County52 sitesPulaski County41 sites

Lowest flow reads

Pike County0%Logan County0%Washington County0%

Highest fresh streamflow pipeline snapshots: Izard County (131%, observation 2026), Clay County (109%, observation 2026), Randolph County (75%, observation 2026). These are source-data observations, not household tap-water conclusions.

All Arkansas Counties

CountySDWIS Compliance Index
Bradley County86.2
Calhoun County86.2
Clark County86.2
Clay County86.2
Cleburne County86.2
Garland County86.2
Grant County86.2
Greene County86.2
Hot Spring County86.2
Izard County86.2
Jefferson County86.2
Lawrence County86.2
Lincoln County86.2
Madison County86.2
Perry County86.2
Pulaski County86.2
Randolph County86.2
Saline County86.2
Scott County86.2
Sharp County86.2
Washington County68.2
White County67.8
Pope County66.9
Independence County64.1
Conway County60.5
St. Francis County58.0
Faulkner County54.5
Craighead County53.8
Crawford County53.8
Cleveland County53.0
Poinsett County52.2
Little River County51.0
Sebastian County49.7
Ashley County49.5
Johnson County47.5
Sevier County47.1
Benton County45.2
Dallas County44.7
Van Buren County42.6
Stone County40.8
Lonoke County39.4
Howard County38.7
Mississippi County36.0
Franklin County35.6
Baxter County33.2
Miller County31.8
Arkansas County31.0
Prairie County30.5
Drew County29.6
Crittenden County29.3
Cross County27.8
Polk County27.5
Marion County24.3
Ouachita County23.4
Nevada County22.2
Boone County21.7
Jackson County21.3
Woodruff County20.9
Union County20.0
Searcy County19.4
Carroll County16.9
Logan County14.0
Hempstead County12.8
Columbia County12.7
Lafayette County10.7
Chicot County9.7
Phillips County8.0
Lee County6.6
Yell County6.5
Desha County5.5
Newton County5.1
Monroe County4.4
Fulton County3.1
Pike County2.5
Montgomery County2.1

Frequently Asked Questions

Which Arkansas county has the highest SDWIS Compliance Index?
Bradley County has the highest SDWIS Compliance Index in the published Arkansas cohort at 86.2/100. This WaterByCounty relative comparison is not an EPA score and does not establish current conditions for a utility or address.
What does the Five-Year SDWIS Compliance Band mean?
The band is derived only from each county aggregation's recorded health-violation rate per 100,000 people served for the stated five-year source window. It is separate from the relative SDWIS Compliance Index and is not a current determination for a specific utility or address.
What does EPA ATTAINS report across Arkansas?
Across 75 published Arkansas county records with EPA ATTAINS data, 3,742 of 11,488 assessed water bodies are listed as impaired. This is a watershed assessment and does not describe finished household tap water.
Which USGS streamflow records are shown across Arkansas?
WaterByCounty has 44 fresh USGS pipeline snapshots in the published Arkansas cohort. Each county page shows its observation timestamp and year. A pipeline snapshot is not a continuously updated reading or a tap-water safety measure.
Where can Arkansas residents find current official information?
Review the applicable utility's Consumer Confidence Report, active notices, and the state drinking-water agency. WaterByCounty's county-level historical aggregations do not establish the current status of a specific utility, address, private well, or household plumbing system.
What does Water Quality Portal monitoring volume show in Arkansas?
The published county records contain 666,690 results from 1,097 monitoring locations in the site's five-year aggregation. Monitoring volume does not by itself indicate better or worse water quality.

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. The WaterByCounty SDWIS Compliance Index reflects the recorded rate and is not an EPA score.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

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