Lancaster County, Pennsylvania
SDWIS compliance plate
Sheet PA071 · Lancaster County 434 sys · 39,193 viol · #177/3254
VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-LARGE · BOOK-FULL
- VIOL-SEVERE 97.9% flagged
- HEALTH-LOW 10.9% health
- RANK-TOP #177/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 95.2% detect
- SRC-GW GW lead 94%
- SYS-LARGE 434 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Snyder County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Lancaster County ranks #177 of 3,254 counties by people served, and #5 of 68 counties in Pennsylvania. See methodology · corpus placement.
Lancaster County standing, mid-flagged corpus third
Flagged-system rate 97.9% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 10.9% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 95.2% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #177 of 3,254 · #5 of 68 in Pennsylvania.
Flagged-rate neighbourhood around Lancaster County
Lowest/highest poles plus in-state counties nearest Lancaster County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Pennsylvania
Mid-flagged peers for Lancaster County
Cross-state counties nearest Lancaster County on flagged-system share (97.9%) and cumulative violation count (39,193). 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. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.