Water quality in Lyons, Colorado
Lyons 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
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Boulder County
40 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Lefthand Wsd Lake Pines |
250 | 0 | 6.1 mi | |
| Olde Stage WD |
250 | 1 | 8.9 mi | |
| Longmont City of |
104,178 | 0 | 8.9 mi | |
| Countryside of Longmont Longmont |
775 | 2 | 9.6 mi | |
| ST Vrain MHP LLC Longmont |
544 | 0 | 9.6 mi | |
| Jamestown Town of |
280 | 7 | 9.7 mi | |
| Left Hand WD |
20,280 | 0 | 10.8 mi | |
| Boulder Meadows MHP |
1,657 | 0 | 11.4 mi | |
| Longs Peak WD |
3,200 | 0 | 11.9 mi | |
| Pine Brook Hills WD |
1,100 | 0 | 12.3 mi | |
| Spring Valley Mutual WA |
100 | 1 | 12.4 mi | |
| San Lazaro Mfctd Housing Community |
844 | 5 | 13.1 mi | |
| Mile HI Water INC Hauler |
1,000 | 3 | 13.5 mi | |
| Allenspark Wsd |
340 | 0 | 13.7 mi | |
| Vista Village MHP Boulder |
750 | 1 | 13.7 mi | |
| Boulder City of |
166,080 | 1 | 13.8 mi | |
| Hoover Hills Wsd |
662 | 0 | 15.4 mi | |
| Baseline WD |
820 | 1 | 16.0 mi | |
| Lark Meadows WA |
75 | 0 | 16.0 mi | |
| Shannon Wsd |
450 | 0 | 16.2 mi | |
| Ward Town of |
230 | 1 | 16.6 mi | |
| Erie Town of |
47,444 | 0 | 17.6 mi | |
| East Boulder County WD |
300 | 3 | 17.6 mi | |
| Table Mesa Village MHP |
75 | 1 | 17.6 mi | |
| Lafayette City of |
28,700 | 4 | 17.9 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 Lyons 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.