County profile · EPA SDWIS + UCMR5
Grand County, Colorado
79 SDWIS-listed public water systems serve 56,214 people in Grand County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 79
- SDWIS water systems Larger third of counties
- 6,442
- Total violations Upper third of counties
- 96.2%
- SDWIS systems w/ a violation Middle third of counties
- 33.3%
- UCMR5 PFAS rate (3 tested) Middle third of counties with tests
SDWIS compliance plate
Sheet CO049 · Grand County 79 sys · 6,442 viol · #890/3254
VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-MID · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 96.2% flagged
- HEALTH-LOW 4.8% health
- RANK-UPPER #890/3254
- PHOTO-FINISH ±0.3 pp
- PFAS-MID 33.3% detect
- SRC-GW GW lead 81%
- SYS-MID 79 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Pueblo County (+ 0.3 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Grand County ranks #890 of 3,254 counties by people served, and #19 of 64 counties in Colorado. See methodology · corpus placement.
Grand County standing, mid-flagged corpus third
Flagged-system rate 96.2% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 4.8% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 33.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #890 of 3,254 · #19 of 64 in Colorado.
Flagged-rate neighbourhood around Grand County
Lowest/highest poles plus in-state counties nearest Grand County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Colorado
Mid-flagged peers for Grand County
Cross-state counties nearest Grand County on flagged-system share (96.2%) and cumulative violation count (6,442). 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.