San Juan County, Colorado — public water systems
At a glance
4 active public water systems are filed under San Juan County, Colorado in EPA's SDWIS records, together reporting 2,994 people served. The largest is Town of Silverton, which reports serving 2,387 people. 1 is a community water system serving people where they live; the other 3 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
4
Population served
3K
Community systems
1
Groundwater share
75%
How does San Juan County compare with other Colorado counties?
San Juan County has the 62nd-most active public water systems among the 113 counties listed for active Colorado systems in EPA records; among the 65 with 3 or more systems, the median has 18. Its systems report 2,994 people served in total, the 57th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 749 people, well below the Colorado average of 3,400. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does San Juan County's drinking water come from?
By primary water source, San Juan County's active systems draw on groundwater (2, 50%), surface water (1, 25%) and groundwater under influence of surface water (1, 25%). Overall, 75% rely mainly on groundwater (including purchased groundwater) and 25% on surface water, compared with 74% and 26% across Colorado. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Town of Silverton, draws primarily on surface water.
What kinds of water systems operate in San Juan County?
San Juan County's active systems break down as 1 community systems (25%), 1 non-transient non-community systems (25%) and 2 transient non-community systems (50%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (50%), local government (25%) and federal government (25%).
Water systems in San Juan County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Silverton Town of | San Juan | 2,387 | Community | Surface water |
| 2 | Grizzly Peak Water Sales | San Juan | 503 | Non-transient non-community | Groundwater |
| 3 | Molas Lake Park | San Juan | 60 | Transient non-community | Groundwater |
| 4 | South Mineral Cg | San Juan | 44 | Transient non-community | Groundwater under influence of surface water |
San Juan County water systems: frequently asked questions
How many public water systems are in San Juan County, Colorado?
EPA's SDWIS records file 4 active public water systems under San Juan County, Colorado: 1 community systems (25%), 1 non-transient non-community systems (25%) and 2 transient non-community systems (50%).
Who supplies drinking water in San Juan County, CO?
The largest community water system filed under San Juan County is Town of Silverton (2,387 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does San Juan County's drinking water come from groundwater or surface water?
Of the 4 active public water systems in San Juan County, 75% draw mainly on groundwater and 25% on surface water, counting purchased supplies. The largest system, Town of Silverton, uses surface water.
Where can I find a water quality report for San Juan County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 1 community system is filed under San Juan County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in San Juan County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Colorado water systems
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in San Juan County, Colorado”, https://aquacensus.com/water-systems/colorado/san-juan (data as of October 1, 2026).