Denver County, Colorado — public water systems
At a glance
4 active public water systems are filed under Denver County, Colorado in EPA's SDWIS records, together reporting 1,312,647 people served. The largest is Denver Water Board, which reports serving 1,287,000 people. All 4 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
4
Population served
1.3M
Community systems
4
Groundwater share
0%
How does Denver County compare with other Colorado counties?
Denver County has the 59th-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 1,312,647 people served in total, the largest county figure in the state and 17% of the statewide total. The average system here reports serving 328,162 people, about 97 times 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 Denver County's drinking water come from?
By primary water source, Denver County's active systems draw on purchased surface water (3, 75%) and surface water (1, 25%). Overall, none rely mainly on groundwater (including purchased groundwater) and all on surface water, compared with 74% and 26% across Colorado. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, Denver Water Board, draws primarily on surface water.
What kinds of water systems operate in Denver County?
Denver County's active systems break down as 4 community systems (100%). 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. EPA lists their owner types as local government (50%) and private (50%).
Water systems in Denver County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Denver Water Board | Denver | 1,287,000 | Community | Surface water |
| 2 | Cherry Creek Valley Wsd | Denver | 22,000 | Community | Purchased surface water |
| 3 | Advenir French Quarter | Denver | 3,447 | Community | Purchased surface water |
| 4 | Aspen Terrace Mobile Park | Denver | 200 | Community | Purchased surface water |
Denver County water systems: frequently asked questions
How many public water systems are in Denver County, Colorado?
EPA's SDWIS records file 4 active public water systems under Denver County, Colorado: 4 community systems (100%).
Who supplies drinking water in Denver County, CO?
The largest community water systems filed under Denver County are Denver Water Board (1,287,000 people served), Cherry Creek Valley Wsd (22,000 people served) and Advenir French Quarter (3,447 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 Denver County's drinking water come from groundwater or surface water?
Of the 4 active public water systems in Denver County, none draw mainly on groundwater and all on surface water, counting purchased supplies. The largest system, Denver Water Board, uses surface water.
Where can I find a water quality report for Denver 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. 4 community systems are filed under Denver 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 Denver 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 Denver County, Colorado”, https://aquacensus.com/water-systems/colorado/denver (data as of October 1, 2026).