County profile · EPA SDWIS + UCMR5
Summit County, Colorado
42 SDWIS-listed public water systems serve 89,593 people in Summit County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 42
- SDWIS water systems Larger third of counties
- 4,364
- Total violations Upper third of counties
- 88.1%
- SDWIS systems w/ a violation Lower third of counties
- 40.0%
- UCMR5 PFAS rate (5 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet CO117 · Summit County 42 sys · 4,364 viol · #626/3254
VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-MID · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 88.1% flagged
- HEALTH-LOW 2.3% health
- RANK-TOP #626/3254
- PHOTO-FINISH ±0.1 pp
- PFAS-MID 40.0% detect
- SRC-GW GW lead 69%
- SYS-MID 42 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Saguache County (+ 0.1 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Summit County ranks #626 of 3,254 counties by people served, and #14 of 64 counties in Colorado. See methodology · corpus placement.
Summit County standing, lower-flagged corpus third
Flagged-system rate 88.1% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 2.3% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 40.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #626 of 3,254 · #14 of 64 in Colorado.
Flagged-rate neighbourhood around Summit County
Lowest/highest poles plus in-state counties nearest Summit County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Colorado
Lower-flagged peers for Summit County
Cross-state counties nearest Summit County on flagged-system share (88.1%) and cumulative violation count (4,364). 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.