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Gilpin County, Colorado — public water systems

At a glance

20 active public water systems are filed under Gilpin County, Colorado in EPA's SDWIS records, together reporting 22,489 people served. The largest is City of Black Hawk, which reports serving 15,167 people. 2 are community water systems serving people where they live; the other 18 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

20

Population served

22.5K

Community systems

2

Groundwater share

85%

How does Gilpin County compare with other Colorado counties?

Gilpin County has the 30th-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 22,489 people served in total, the 29th-largest county figure in the state and 0.3% of the statewide total. The average system here reports serving 1,125 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 Gilpin County's drinking water come from?

By primary water source, Gilpin County's active systems draw on groundwater (16, 80%), surface water (2, 10%), groundwater under influence of surface water (1, 5%) and purchased surface water (1, 5%). Overall, 85% rely mainly on groundwater (including purchased groundwater) and 15% 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, City of Black Hawk, draws primarily on surface water.

What kinds of water systems operate in Gilpin County?

Gilpin County's active systems break down as 2 community systems (10%), 2 non-transient non-community systems (10%) and 16 transient non-community systems (80%). 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 (45%), local government (25%), state government (15%) and federal government (15%).

Water systems in Gilpin County

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Active public water systems in Gilpin County, Colorado
#Water systemCountyPopulation servedTypeSource
1Black Hawk City ofGilpin15,167CommunitySurface water
2Central City City ofGilpin3,750CommunitySurface water
3Gilpin County SchoolGilpin562Non-transient non-communityGroundwater
4Z-StopGilpin500Transient non-communityGroundwater
5Columbine CgGilpin376Transient non-communityGroundwater
6Cold Springs CgGilpin304Transient non-communityGroundwater
7Base Camp at Golden Gate CanyonGilpin302Transient non-communityGroundwater
8Ggcsp Reverends RidgeGilpin301Transient non-communityGroundwater
9Hawk Gs Properties LLC TaggertsGilpin253Transient non-communityGroundwater
10Pickle Gulch CgGilpin250Transient non-communityGroundwater
11Trinity Mountain RanchGilpin122Transient non-communityGroundwater
12Ggcsp Aspen Meadows Rim RockGilpin100Transient non-communityGroundwater
13Camp EdenGilpin100Transient non-communityGroundwater under influence of surface water
14Ggcsp Visitor CenterGilpin83Transient non-communityGroundwater
15Gilpin County Public LibraryGilpin79Transient non-communityPurchased surface water
16Gilpin County Justice CenterGilpin69Non-transient non-communityGroundwater
17Shoshoni Yoga RetreatGilpin62Transient non-communityGroundwater
18Rollinsville West Center LLCGilpin46Transient non-communityGroundwater
19Coyote MotelGilpin34Transient non-communityGroundwater
20Toss Wood Fired EateryGilpin29Transient non-communityGroundwater

Gilpin County water systems: frequently asked questions

How many public water systems are in Gilpin County, Colorado?

EPA's SDWIS records file 20 active public water systems under Gilpin County, Colorado: 2 community systems (10%), 2 non-transient non-community systems (10%) and 16 transient non-community systems (80%).

Who supplies drinking water in Gilpin County, CO?

The largest community water systems filed under Gilpin County are City of Black Hawk (15,167 people served) and City of Central City (3,750 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 Gilpin County's drinking water come from groundwater or surface water?

Of the 20 active public water systems in Gilpin County, 85% draw mainly on groundwater and 15% on surface water, counting purchased supplies. The largest system, City of Black Hawk, uses surface water.

Where can I find a water quality report for Gilpin 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. 2 community systems are filed under Gilpin 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 Gilpin 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 Gilpin County, Colorado”, https://aquacensus.com/water-systems/colorado/gilpin (data as of October 1, 2026).