County profile · EPA SDWIS + UCMR5
Louisa County, Virginia
40 SDWIS-listed public water systems serve 18,333 people in Louisa County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 40
- SDWIS water systems Larger third of counties
- 2,117
- Total violations Middle third of counties
- 90.0%
- SDWIS systems w/ a violation Lower third of counties
- 0.0%
- UCMR5 PFAS rate (1 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet VA109 · Louisa County 40 sys · 2,117 viol · #1850/3254
VIOL-SEVERE · HEALTH-MID · RANK-MID · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 90.0% flagged
- HEALTH-MID 26.3% health
- RANK-MID #1850/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 93%
- SYS-MID 40 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Orange County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Louisa County ranks #1,850 of 3,254 counties by people served, and #43 of 95 counties in Virginia. See methodology · corpus placement.
Louisa County standing, lower-flagged corpus third
Flagged-system rate 90.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 26.3% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,850 of 3,254 · #43 of 95 in Virginia.
Flagged-rate neighbourhood around Louisa County
Lowest/highest poles plus in-state counties nearest Louisa County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Virginia
Lower-flagged peers for Louisa County
Cross-state counties nearest Louisa County on flagged-system share (90.0%) and cumulative violation count (2,117). 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.