Water quality in Hidden Lake, Colorado
Hidden Lake is in Boulder County. 80 active public water systems serve the county; 45 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Boulder County
40 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Jamestown Town of |
280 | 7 | 4.6 mi | |
| Allenspark Wsd |
340 | 0 | 6.7 mi | |
| Olde Stage WD |
250 | 1 | 9.0 mi | |
| Pine Brook Hills WD |
1,100 | 0 | 9.7 mi | |
| Nederland Town of |
2,406 | 0 | 9.9 mi | |
| Lefthand Wsd Lake Pines |
250 | 0 | 10.3 mi | |
| Spring Valley Mutual WA |
100 | 1 | 10.5 mi | |
| Boulder Meadows MHP |
1,657 | 0 | 12.5 mi | |
| Vista Village MHP Boulder |
750 | 1 | 13.1 mi | |
| Boulder City of |
166,080 | 1 | 13.4 mi | |
| Lyons Town of |
2,990 | 0 | 13.7 mi | |
| San Lazaro Mfctd Housing Community |
844 | 5 | 14.5 mi | |
| Table Mesa Village MHP |
75 | 1 | 15.9 mi | |
| Eldorado Municipal System |
308 | 0 | 16.0 mi | |
| Mile HI Water INC Hauler |
1,000 | 3 | 16.1 mi | |
| Hoover Hills Wsd |
662 | 0 | 16.1 mi | |
| Sans Souci Cooperative |
150 | 8 | 16.5 mi | |
| Baseline WD |
820 | 1 | 17.6 mi | |
| East Boulder County WD |
300 | 3 | 18.1 mi | |
| Lark Meadows WA |
75 | 0 | 18.2 mi | |
| Left Hand WD |
20,280 | 0 | 18.4 mi | |
| Shannon Wsd |
450 | 0 | 19.1 mi | |
| Longmont City of |
104,178 | 0 | 19.6 mi | |
| Louisville City of |
20,975 | 1 | 20.1 mi | |
| Countryside of Longmont Longmont |
775 | 2 | 20.4 mi |
Non-community systems in Boulder County (39: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Boulder County, nearest to Hidden Lake first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Colorado records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.