waterbycounty
Compiled federal source snapshot

Nebraska Water Quality

Drinking water data for all 89 counties.

Avg SDWIS Compliance Index

56.5

Most Common Five-Year SDWIS Compliance Band

A

Counties with Data

89

of 89 total

County water atlas

Nebraska 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

89

Avg SDWIS index

56.5

Watersheds

89

ATTAINS counties

Monitoring

78

48 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 Nebraska

Beyond Drinking Water

EPA SDWIS

89/ 89

counties with drinking-water compliance data

277 health violations statewide (5yr)

EPA ATTAINS

68.1%

avg impaired across 89 counties

688 of 1,021 assessed bodies impaired

EPA WQP

763

monitoring sites across 78 counties

316,800 total readings (5yr window)

USGS NWIS

48

counties with a fresh pipeline snapshot

2 above43 below

State atlas notes

What stands out in Nebraska

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

Banner County has the highest value in the published state SDWIS Compliance Index table at 86.2/100, while Dixon County has the lowest at 1.7/100. That is a 84.5 point gap inside one state.

Zero health violations

43

3+ health violations

21

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.

Box Butte County100.0%Dawes County100.0%Gage County100.0%

Monitoring hubs

Sarpy County69 sitesDouglas County45 sitesHall County30 sites

Lowest flow reads

Keith County0%Kimball County0%Hitchcock County1%

Highest fresh streamflow pipeline snapshots: Thomas County (116%, observation 2026), Dodge County (116%, observation 2026), Brown County (105%, observation 2026). These are source-data observations, not household tap-water conclusions.

All Nebraska Counties

CountySDWIS Compliance Index
Banner County86.2
Blaine County86.2
Boone County86.2
Box Butte County86.2
Boyd County86.2
Brown County86.2
Burt County86.2
Chase County86.2
Cheyenne County86.2
Dakota County86.2
Douglas County86.2
Dundy County86.2
Franklin County86.2
Furnas County86.2
Gage County86.2
Garden County86.2
Garfield County86.2
Gosper County86.2
Grant County86.2
Hayes County86.2
Holt County86.2
Hooker County86.2
Howard County86.2
Kearney County86.2
Keith County86.2
Keya Paha County86.2
Knox County86.2
Lincoln County86.2
Logan County86.2
Merrick County86.2
Morrill County86.2
Nemaha County86.2
Nuckolls County86.2
Pawnee County86.2
Scotts Bluff County86.2
Sheridan County86.2
Sherman County86.2
Sioux County86.2
Thomas County86.2
Valley County86.2
Wayne County86.2
Webster County86.2
Wheeler County86.2
Lancaster County70.7
Buffalo County64.8
Dodge County62.9
Madison County62.9
Dawson County57.8
Hall County56.9
Sarpy County55.9
Saunders County54.1
Saline County51.8
Colfax County46.5
Richardson County45.8
Phelps County44.4
Cass County37.8
Butler County37.7
Washington County36.0
Fillmore County35.8
Stanton County34.5
Thayer County33.0
Custer County31.7
Polk County30.5
Seward County30.3
Kimball County29.6
York County24.8
Johnson County24.2
Adams County22.9
Perkins County20.9
Harlan County20.8
Hitchcock County19.9
Cherry County19.8
Frontier County18.9
Cedar County18.4
Deuel County15.0
Platte County13.2
Otoe County11.2
Rock County11.0
Red Willow County10.9
Antelope County10.5
Nance County8.6
Jefferson County7.6
Greeley County7.5
Clay County7.0
Dawes County6.2
Cuming County5.4
Pierce County4.7
Hamilton County3.2
Dixon County1.7

Frequently Asked Questions

Which Nebraska county has the highest SDWIS Compliance Index?
Banner County has the highest SDWIS Compliance Index in the published Nebraska 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 Nebraska?
Across 89 published Nebraska county records with EPA ATTAINS data, 688 of 1,021 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 Nebraska?
WaterByCounty has 48 fresh USGS pipeline snapshots in the published Nebraska 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 Nebraska 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 Nebraska?
The published county records contain 316,800 results from 763 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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