waterbycounty
Compiled federal source snapshot

Virginia Water Quality

Drinking water data for all 95 counties.

Avg SDWIS Compliance Index

58.5

Most Common Five-Year SDWIS Compliance Band

A

Counties with Data

95

of 95 total

County water atlas

Virginia 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

95

Avg SDWIS index

58.5

Watersheds

95

ATTAINS counties

Monitoring

95

70 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 Virginia

Beyond Drinking Water

EPA SDWIS

95/ 95

counties with drinking-water compliance data

299 health violations statewide (5yr)

EPA ATTAINS

82.6%

avg impaired across 95 counties

4,927 of 5,867 assessed bodies impaired

EPA WQP

4,287

monitoring sites across 95 counties

1,317,515 total readings (5yr window)

USGS NWIS

70

counties with a fresh pipeline snapshot

8 above56 below

State atlas notes

What stands out in Virginia

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

Albemarle County has the highest value in the published state SDWIS Compliance Index table at 86.2/100, while Rappahannock County has the lowest at 0.1/100. That is a 86.1 point gap inside one state.

Zero health violations

47

3+ health violations

26

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.

Arlington County100.0%Warren County100.0%Mathews County99.1%

Monitoring hubs

Fairfax County299 sitesJames City County131 sitesAccomack County129 sites

Lowest flow reads

Surry County6%Rockbridge County8%Isle of Wight County11%

Highest fresh streamflow pipeline snapshots: Dinwiddie County (630%, observation 2026), Sussex County (414%, observation 2026), Brunswick County (251%, observation 2026). These are source-data observations, not household tap-water conclusions.

All Virginia Counties

CountySDWIS Compliance Index
Albemarle County86.2
Amelia County86.2
Appomattox County86.2
Arlington County86.2
Augusta County86.2
Bath County86.2
Bedford County86.2
Bland County86.2
Campbell County86.2
Carroll County86.2
Chesterfield County86.2
Cumberland County86.2
Essex County86.2
Fairfax County86.2
Fluvanna County86.2
Frederick County86.2
Goochland County86.2
Greensville County86.2
Halifax County86.2
Hanover County86.2
Henrico County86.2
Henry County86.2
Highland County86.2
James City County86.2
King and Queen County86.2
King William County86.2
Lancaster County86.2
Mecklenburg County86.2
Montgomery County86.2
New Kent County86.2
Northampton County86.2
Patrick County86.2
Powhatan County86.2
Prince Edward County86.2
Prince George County86.2
Richmond County86.2
Roanoke County86.2
Rockbridge County86.2
Russell County86.2
Smyth County86.2
Stafford County86.2
Surry County86.2
Sussex County86.2
Tazewell County86.2
Washington County86.2
Westmoreland County86.2
York County86.2
Prince William County69.0
Loudoun County68.5
Spotsylvania County65.9
Wise County64.1
Fauquier County63.6
Culpeper County61.3
Rockingham County59.6
Lee County57.6
Amherst County56.3
Alleghany County52.7
Botetourt County52.6
Gloucester County50.8
Warren County47.7
Franklin County46.3
Page County42.1
Northumberland County41.1
Giles County38.1
King George County38.1
Southampton County36.1
Buchanan County34.8
Grayson County31.8
Dinwiddie County28.7
Wythe County27.9
Scott County27.3
Orange County27.1
Pittsylvania County26.7
Floyd County26.1
Middlesex County22.8
Greene County21.9
Charlotte County21.0
Accomack County19.0
Shenandoah County18.6
Pulaski County16.1
Craig County15.8
Dickenson County14.7
Louisa County14.5
Nelson County14.5
Caroline County12.5
Buckingham County11.7
Nottoway County10.9
Lunenburg County9.5
Clarke County9.1
Isle of Wight County7.9
Madison County7.8
Charles City County6.3
Brunswick County5.9
Mathews County1.2
Rappahannock County0.1

Frequently Asked Questions

Which Virginia county has the highest SDWIS Compliance Index?
Albemarle County has the highest SDWIS Compliance Index in the published Virginia 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 Virginia?
Across 95 published Virginia county records with EPA ATTAINS data, 4,927 of 5,867 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 Virginia?
WaterByCounty has 70 fresh USGS pipeline snapshots in the published Virginia 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 Virginia 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 Virginia?
The published county records contain 1,317,515 results from 4,287 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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