County · Colorado
Summit County, Colorado: drinking water records
This overview covers 4 ZIP codes and 23 community water systems in Summit County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Breckenridge Town of CO0159020 | 28,315 | 120 | 0 | 2 | 2 ppb |
| Frisco Town of CO0159055 | 4,495 | 240 | 0 | 1 | 4 ppb |
| Snake River WD CO0159105 | 9,900 | 120 | 7 | 0 | 0.9 ppb |
| Silverthorne Town of CO0159095 | 8,400 | 240 | 2 | 0 | 0 ppb |
| Copper Mountain Consolidated Md CO0159030 | 5,785 | 120 | 0 | 0 | 5 ppb |
| Keystone Ranch CO0159065 | 670 | 0 | 0 | 1 | 32 ppb |
| Farmers Korner MHP CO0159050 | 159 | 0 | 0 | 4 | 0.5 ppb |
| Dillon Town of CO0159035 | 3,254 | 0 | 0 | 0 | 8 ppb |
| Dillon Valley District CO0159040 | 3,063 | 0 | 0 | 0 | 3 ppb |
| Buffalo Mountain Md CO0159025 | 2,650 | 0 | 0 | 0 | 1 ppb |
| East Dillon WD CO0159045 | 2,501 | 0 | 0 | 0 | 4.2 ppb |
| Mesa Cortina WSD CO0159080 | 466 | 0 | 0 | 0 | 3.5 ppb |
| Timber Creek WD CO0259003 | 312 | 0 | 0 | 0 | 0 ppb |
| Hamilton Creek Md CO0159063 | 200 | 0 | 0 | 0 | 0 ppb |
| Swans Nest Md CO0159725 | 200 | 0 | 0 | 0 | 1.5 ppb |
| Sage Creek Canyon Corp CO0159090 | 192 | 0 | 0 | 0 | 1.1 ppb |
| Alpensee WD CO0159119 | 168 | 0 | 0 | 0 | 1.5 ppb |
| Blue River Valley Ranch Lakes CO0159005 | 150 | 0 | 0 | 0 | 2.5 ppb |
| Heeney Water District CO0159060 | 150 | 0 | 0 | 0 | 1.5 ppb |
| Willow Brook Metro District CO0259020 | 120 | 0 | 0 | 0 | 2 ppb |
| Tanglewood Ws CO0159120 | 60 | 0 | 0 | 0 | 15 ppb |
| Wayside CO0259019 | 40 | 0 | 0 | 0 | 8.5 ppb |
| Swan Meadow Village CO0159727 | 455 | 0 | 0 | 0 | not reported |
ZIP reports in Summit County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.