Independent U.S. water utility directory · 2026 edition
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State utility hub

Water utilities serving Colorado

Browse the indexed community water systems in this state. Each profile brings the provider’s payment routes and household protection policies into a single, practical guide.

138 systems indexed2026 directory

Public Water Authority

Denver Water

08

Service area: Denver and surrounding suburban distributor districts across the Denver metropolitan area, including Denver Water’s inside-city, total-service, and read-and-bill territories

Population: Approximately 1.5 million people in Denver and surrounding suburbs

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08

Service area: Colorado Springs, Fort Carson, Peterson Space Force Base, United States Air Force Academy, Cheyenne Mountain Space Force Station, Ute Pass communities, and other regional suburban customers in the Utilities water service territory

Population: The Colorado Springs Utilities water system served an estimated approximately 540,000 people in 2024, including Colorado Springs residents, Ute Pass communities west of the City, military bases, and suburban customers outside City limits. The EPA SDWIS record for PWSID CO0121150 reports 464,111 as the federal population-served value; the difference reflects reporting vintage and the broader operating-system estimate.

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08

Service area: Aurora and the Aurora Water service territory in the Denver metropolitan area

Population: Over 400,000 residents in Aurora and the surrounding Aurora Water service area, according to the city’s utility highlights; the exact SDWIS population value varies by reporting system and service-area definition.

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08

Service area: Fort Collins Utilities water service area in Fort Collins and portions of the surrounding service territory

Population: Fort Collins Utilities supplies water to approximately 75% of residents and businesses inside Fort Collins; the city’s current water page reports more than 35,000 residential and commercial water accounts and about 80% of the city population in a recent utility planning summary.

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08

Service area: Greeley, Colorado, plus regional water-service agreements in Weld County

Population: Approximately 124,000 people including regional water-service agreements, according to the department’s official director brochure; separate planning documents report more than 110,000 people and the potable distribution system serves more than 115,000 customers.

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08

Service area: Thornton and the city’s extended treated-water service area, including portions of unincorporated Adams County and bulk treated-water deliveries to Westminster

Population: Approximately 225,000 people served by Thornton’s drinking-water system according to the city’s 2025 water-quality report; the 2025 water-efficiency plan separately describes about 165,453 people in the existing treated-water service area and 43,048 metered connections in its 2022 baseline.

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08

Service area: City of Boulder and selected outside-city agreements and water-service areas

Population: Approximately 120,000 residents and numerous businesses, according to the city’s current Water Conservation page; the city’s service area includes city customers and selected outside-city agreements.

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08

Service area: Longmont and the City water service area

Population: Approximately 100,000 residents in Longmont; the City’s 2025 Census estimate is 100,109, and its capital planning materials describe AMI monitoring for approximately 30,000 water customers. The city provides water and sanitary sewer inside the existing city limits and has additional agreements and planning-area relationships outside the city boundary.

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Public Water Authority

Pueblo Water

08

Service area: Pueblo and the Pueblo Water service area

Population: Approximately 110,404 residents in the City of Pueblo based on the July 1, 2025 Census estimate; Pueblo Water also serves customers outside city limits at separately published rates. The exact current system population and connection count were not stated on the customer-service pages reviewed.

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08

Service area: Westminster, Shaw Heights, and designated outside-city service areas

Population: Approximately 116,182 residents in Westminster based on the July 1, 2025 Census estimate, plus separately billed Shaw Heights and outside-city customers. The City’s current public utility pages do not state a single systemwide connection count.

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08

Service area: Arvada and the City of Arvada water, wastewater, and stormwater service area

Population: Approximately 122,901 residents in Arvada based on the July 1, 2025 Census estimate. The City operates the local water and wastewater systems, including more than 600 miles of water pipe and more than 450 miles of wastewater pipe; the exact current customer count was not stated on the billing pages reviewed.

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08

Service area: Broomfield and the City and County of Broomfield water service area

Population: Approximately 79,174 residents in Broomfield based on the July 1, 2025 Census estimate. The City and County operates water, sewer, water-reclamation, and stormwater enterprise funds; the exact current drinking-water connection count was not stated on the reviewed billing pages.

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08

Service area: Grand Junction, Clifton, and designated City of Grand Junction water-service areas

Population: The City of Grand Junction has approximately 71,827 residents based on the July 1, 2025 Census estimate and reports more than 25,000 water customers. The City’s CustomerConnect materials also distinguish City, Clifton, and Ute water users by service address.

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08

Service area: Loveland and the City of Loveland Utilities service area

Population: Approximately 81,387 residents in Loveland based on the July 1, 2025 Census estimate. The City’s water, wastewater, electric, and communications utilities operate as not-for-profit enterprise services; the exact current water-connection count was not stated on the reviewed public pages.

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08

Service area: Lakewood and the City of Lakewood Water Utility service area; sewer service varies by neighborhood

Population: Approximately 156,927 residents in Lakewood based on the July 1, 2025 Census estimate. The City Water Utility distributes purchased Denver Water through City-owned lines; sewer service is not universal across Lakewood and some areas are served by other providers.

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Municipal Department

Town of Castle Rock Water

08

Service area: Castle Rock and Town water service limits

Population: Approximately 83,815 residents in Castle Rock based on the July 1, 2025 Census estimate. Castle Rock Water reports supporting more than 28,000 customers each month for integrated drinking-water, wastewater, and stormwater services within Town limits.

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08

Service area: Highlands Ranch, Solstice, and Northern Douglas County service area

Population: Approximately 110,000 residents and approximately 47,000 residential and non-residential customers across Highlands Ranch, Solstice, and adjacent Northern Douglas County service areas. More than 94% of the District’s customers live in Highlands Ranch; the 2025 water-quality report identifies approximately 30,000 single-family homes, 7,200 multifamily homes, and 1,100 commercial customers.

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08

Service area: Parker and surrounding southeastern Denver-metro service area, including portions of Lone Tree and Castle Pines

Population: Approximately 81,000 people across approximately 22,300 water and wastewater accounts, according to PWSD's official About Us page.

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08

Service area: Castle Pines North, west of Interstate 25, including residential, commercial, school, park, open-space, and golf-course customers

Population: Approximately 10,000 residents and more than 3,200 residential and business customers, based on district-area service descriptions; the district's current billing pages do not publish a newer population total.

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08

Service area: The Village at Castle Pines, Castle Rock, Colorado

Population: Approximately 1,900 homes, with about 1,678 billable full-metro homes reflected in the district's 2026 billing recap; the district does not publish a current resident-population estimate on its billing pages.

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08

Service area: Northwest Douglas County, with current wholesale service to Sterling Ranch Community Authority Board

Population: Current retail customer is Sterling Ranch Community Authority Board; Sterling Ranch is planned to exceed 30,000 residents at build-out and is the current approximately 3,400-acre wholesale service area. Dominion does not publish a current retail population total because it is a wholesale provider.

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08

Service area: Inverness business and residential service area in Arapahoe and Douglas Counties, centered in Englewood

Population: A dedicated this detail was not publicly posted. The District's current public pages publish meter-size and SFE rate categories but do not state a current population or account total. The service area includes commercial buildings and residential customers in the Inverness area.

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08

Service area: Meridian Ranch, Falcon/Peyton area of El Paso County

Population: Meridian Ranch is a 2,650-acre master-planned community with a proposed 5,000 residential-unit build-out; the District's current public pages do not publish a current resident total or connection count.

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08

Service area: The Pinery, Timbers, Misty Pines, Pinery Glen, High Prairie Farms, Pradera, Vistancia, and Colorado Golf Club in northeastern Douglas County

Population: Approximately 4,500 residential accounts serving about 15,000 residents, plus approximately 90 large irrigator and commercial customers.

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Public Water Authority

Rangeview Metropolitan District

08

Service area: Rangeview Metropolitan District service areas in eastern Colorado, including Watkins and associated Pure Cycle-operated communities

Population: A dedicated this detail was not publicly posted. The official payment page does not state a current population or account count. Pure Cycle's related customer information describes a portfolio of more than 600 current connections and future growth across its service areas, but not a Rangeview-only population.

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08

Service area: Cottonwood service area in Parker and Douglas County, Colorado

Population: A dedicated this detail was not publicly posted. The District's current public pages identify residential, commercial, multifamily, and irrigation customers but do not publish a current population or account total.

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08

Service area: Greenwood Village and southeast Denver metro

Population: A dedicated this detail was not publicly posted. The District serves the area roughly bounded by Belleview Avenue, I-225, Yosemite Street, and Fulton Street but publishes no current population total.

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Public Water Authority

Penrose Water District

08

Service area: Penrose, Fremont County

Population: A dedicated this detail was not publicly posted. The District's public rate page does not publish a current population total.

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Municipal Department

UTE WCD

08

Service area: GRAND JUNCTION

Population: 92580 people (EPA SDWIS 2026Q2 active CWS estimate for CO0139791)

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Colorado directory notes

How to compare water utilities in Colorado

This state hub brings together 138 indexed community water systems, from city departments and public authorities to investor-owned systems and smaller regional providers. A service area may cross municipal boundaries, so use the provider name and service address on your bill when choosing a profile.

The most important distinction is between a directory listing and an official account channel. Water Ledger provides a structured starting point; the utility’s own payment portal, published rate schedule, customer-service office, and mailed notice control your account. Compare the payment route, billing frequency, emergency number, and customer-protection notes before relying on a page for a time-sensitive decision.

If you are helping a household with a high bill, leak, or delinquency notice, open the utility profile and review the payment, shut-off, and leak-adjustment guides together. Keep the bill, account number, confirmation receipts, repair records, and notice dates available when speaking with the provider.