County profile · EPA SDWIS + UCMR5
Prince William County, Virginia
45 SDWIS-listed public water systems serve 416,494 people in Prince William County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 45
- SDWIS water systems Larger third of counties
- 1,444
- Total violations Middle third of counties
- 84.4%
- SDWIS systems w/ a violation Lower third of counties
- 80.0%
- UCMR5 PFAS rate (5 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet VA153 · Prince William County 45 sys · 1,444 viol · #172/3254
VIOL-SEVERE · HEALTH-MID · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 84.4% flagged
- HEALTH-MID 22.6% health
- RANK-TOP #172/3254
- PHOTO-FINISH ±0.2 pp
- PFAS-HIGH 80.0% detect
- SRC-GW GW lead 82%
- SYS-MID 45 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Spotsylvania County ( -0.2 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Prince William County ranks #172 of 3,254 counties by people served, and #3 of 95 counties in Virginia. See methodology · corpus placement.
Prince William County standing, lower-flagged corpus third
Flagged-system rate 84.4% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 22.6% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 80.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #172 of 3,254 · #3 of 95 in Virginia.
Flagged-rate neighbourhood around Prince William County
Lowest/highest poles plus in-state counties nearest Prince William County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Virginia
Lower-flagged peers for Prince William County
Cross-state counties nearest Prince William County on flagged-system share (84.4%) and cumulative violation count (1,444). In-state neighbours stay on the compliance plate above.
Similar flagged-system rate
Nearest cross-state counties by % of SDWIS systems with at least one violation on record.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.