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Counties → Colorado

Douglas County, Colorado

SDWIS compliance plate

Sheet CO035 · Douglas County 73 sys · 7,411 viol · #170/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 94.5% flagged
  • HEALTH-LOW 6.7% health
  • RANK-TOP #170/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-HIGH 61.5% detect
  • SRC-GW GW lead 71%
  • SYS-MID 73 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Chaffee County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Douglas County ranks #170 of 3,254 counties by people served, and #8 of 64 counties in Colorado. See methodology · corpus placement.

Douglas County standing, mid-flagged corpus third

Flagged-system rate 94.5% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 6.7% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 61.5% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #170 of 3,254 · #8 of 64 in Colorado.

Flagged-rate neighbourhood around Douglas County

Lowest/highest poles plus in-state counties nearest Douglas County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Broomfield · lowest Alamosa · near Douglas · this county Kiowa · highest 66.7% 94.1% 94.1% 94.3% 94.5% 95% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Castle Rock Town Of 106,822 52 Detected
Highlands Ranch WSD 103,444 13 Detected
Parker WSD 75,949 466 Detected
Meridian MD 23,415 10 Clean
Stonegate MD 15,295 283 Detected
Roxborough WSD 13,765 27 Clean
Pinery Wwd 12,901 328 Detected
Castle Pines North MD 12,800 231 Detected
Sterling Ranch Cab 11,357 8 -
Cottonwood WSD 10,867 131 Detected
Northern Douglas County WSD 6,160 52 Detected
Castle Pines Village MD 5,656 173 Clean
Perry Park WSD 3,890 153 Clean
Consolidated Bell Mtn Ranch MD 1,000 4 -
Parker Evangelical Pres Church Pepc 950 17 -
Alta Convenience No 6104 906 17 -
Roxborough NW Douglas County 860 8 -
Sierra Middle School 750 246 -
Roxborough State Park 710 26 -
Journey Church 626 0 -
Clock Tower Center 560 5 Clean
Castleton Center 500 20 -
Thunderbird WSD 490 541 -
Franktown Elem School 365 239 -
Encompass Preschool 364 395 -
Castlewood Canyon State Park 359 38 -
Beverly Hills Mutual WC 325 87 -
Chatfield South WD 312 37 -
Creekside Bible Church 310 3 -
Silver State Baptist Youth Camp 306 28 -
Silver Heights WSD 301 34 -
Larkspur Town Of 275 143 -
Sanctuary Golf Course 240 6 -
Louviers WSD 238 242 -
Pine Lane Plaza 226 4 -
Stone Canyon Outdoor Edventures 221 484 -
Yogi Bears Jellystone Park Camp Resort 218 41 -
Sedalia WSD 215 551 -
YMCA Camp Shady Brook 208 89 -
Directv Broadcast Facility 200 13 -
Castle Park MHP 191 12 -
Deckers Resort 174 18 -
Pine Tree Plaza West 170 128 -
Ponderosa Retreat and Conference Ctr 167 46 -
Westcreek Lakes WD 165 218 -
Indian Creek Campground 158 26 -
Castle Rock Congre of Jehovahs Witnesses 145 27 -
Golf Club at Bear Dance The 134 7 -
Cornerstone Presbyterian Church 130 140 -
Douglas County Schools O and M East 126 105 -

Compare beyond Colorado

Mid-flagged peers for Douglas County

Cross-state counties nearest Douglas County on flagged-system share (94.5%) and cumulative violation count (7,411). 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.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

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.