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Counties → Colorado

Summit County, Colorado

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.

0% 20% 40% 60% 80% 100% Broomfield · lowest Moffat · near Saguache · near Kiowa · highest 66.7% 87.5% 87.5% 88.1% 88.2% 89.3% 100%

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

Water Systems

System Name Population Violations PFAS
Breckenridge Town Of 28,315 221 Clean
Snake River WD 9,900 133 Detected
Silverthorne Town Of 8,414 362 Detected
Copper Mountain Consolidated MD 5,785 7 Clean
Frisco Town Of 4,495 820 Clean
Cdot Vail Pass Ra 3,302 77 -
Dillon Town Of 3,254 30 -
Keystone Summit Lodge 3,241 16 -
Dillon Valley District 3,063 7 -
Buffalo Mountain MD 2,650 23 -
East Dillon WD 2,501 30 -
Keystone Lodge IV 2,268 0 -
Aerie 2,077 39 -
Arapahoe Basin Ski Area 1,149 0 -
Keystone la Bontes Cabin 972 0 -
Breckenridge Ski Corp Peak 9 950 15 -
Arapahoe Basin Ski Area Midway Lodge 890 0 -
Peak 8 Restaurant Vista Haus 850 15 -
Breckenridge Mountain Resort Peak 7 WS 750 4 -
Keystone Ranch 670 11 -
Tiger Run HOA RV Park 510 36 -
Breckenridge Peak 6 Warming Hut 500 0 -
Mesa Cortina WSD 466 8 -
Timber Creek WD 312 399 -
Peak One Pine Cove Cg 250 27 -
Lowry Cg Prospector Cg 225 19 -
Hamilton Creek MD 200 22 -
Swans Nest MD 200 28 -
Sage Creek Canyon Corp 192 297 -
Alpensee WD 168 84 -
Farmers Korner MHP 159 605 -
Blue River Valley Ranch Lakes 150 12 -
Heeney Water District 150 28 -
Peak 8 Village Condos 127 70 -
Willow Brook Metro District 120 393 -
Good Times Adventure Tours 100 12 -
Kingdom Park Court 70 7 -
Tanglewood WS 60 79 -
Wayside 40 243 -
Quandry Condos Skiers Edge 34 89 -
Agape Outpost Baptist Chapel 34 67 -
Christ Lutheran Church School 30 29 -

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.

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.