Public water system · CO0162260

Active

Evans City of

At a glance

City of Evans (PWSID CO0162260) is an active community water system in Weld County, Colorado. It reports serving 19,369 people through 6,896 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

19,369

Service connections

6,896

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDCO0162260

System typeCommunity water system

Activity statusActive

Population served19,369

Service connections6,896

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyCO state drinking water program

City served—

StateColorado

ZIP—

CountyWeld County

How does City of Evans compare with other water systems in Weld County?

By EPA's size categories, City of Evans is a large system (10,001 to 100,000 people). Weld County has 75 active public water systems, and City of Evans is the 5th-largest of them by population served. Its population served is about 4 times the county average of 4,824 people per system, and accounts for 5.4% of the 361,765 people reported by systems filed under the county. Across Colorado, the 2,207 active systems average 3,400 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Evans is about 189% above that figure.

What does “community water system” mean?

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. Colorado has 1,068 active community water systems, 48% of the state's 2,207 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 337 Colorado systems (15%) list purchased surface water as their primary source.

Who owns and regulates City of Evans?

EPA lists City of Evans as owned by a local government. The CO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 31 of the 75 active systems in Weld County (41%) are also owned by a local government.

Does City of Evans have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. The violations listed here began between July 2009 and October 2024. By type: 8 monitoring and reporting and 4 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (3 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.

Began	Violation	Contaminant or rule	Health-based	Status
2024-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2023-04-29	Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76	Public Noticecode 7500	No	Resolved
2020-03-28	Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76	Public Noticecode 7500	No	Resolved
2016-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2016-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2014-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2014-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2014-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2012-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2012-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2010-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2009-07-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved

The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

City of Evans: frequently asked questions

Who runs City of Evans?

City of Evans (PWSID CO0162260) is a community water system owned by a local government. It is regulated by the CO state drinking water program.

How many people does City of Evans serve?

City of Evans reports serving 19,369 people through 6,896 service connections in Weld County, Colorado.

Where does City of Evans get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does City of Evans have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is City of Evans' water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.

Where can I find City of Evans' water quality report?

As a community water system, City of Evans must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Weld County

Water system	County	Population served	Type	Source
Greeley City of	Weld	132,310	Community	Surface water
Firestone Town of	Weld	27,798	Community	Purchased surface water
Johnstown Town of	Weld	27,295	Community	Surface water
Windsor Town of	Weld	23,500	Community	Purchased surface water
Frederick Town of	Weld	17,173	Community	Purchased surface water
North Weld County Wd	Weld	15,890	Community	Purchased surface water

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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, “Evans City of, PWSID CO0162260, Colorado”, https://aquacensus.com/water-systems/colorado/evans-city-of-co0162260 (data as of October 1, 2026).