Public water system · CO0101115
ActiveNorthglenn City of
At a glance
City of Northglenn (PWSID CO0101115) is an active community water system in Adams County, Colorado. It reports serving 48,927 people through 10,203 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 1988.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
48,927
Service connections
10,203
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Northglenn compare with other water systems in Adams County?
By EPA's size categories, City of Northglenn is a large system (10,001 to 100,000 people). Adams County has 82 active public water systems, and City of Northglenn is the 5th-largest of them by population served. Its population served is about 5.6 times the county average of 8,669 people per system, and accounts for 6.9% of the 710,822 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 Northglenn is about 7.3 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 228 Colorado systems (10%) list surface water as their primary source.
Who owns and regulates City of Northglenn?
EPA lists City of Northglenn 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. 19 of the 82 active systems in Adams County (23%) are also owned by a local government.
Does City of Northglenn have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 1988. The violations listed here began between January 1988 and January 1988. By type: 7 monitoring and reporting. The contaminants or rules involved are Carbon tetrachloride, 1,1,1-Trichloroethane, 1,2-Dichloroethane and p-Dichlorobenzene. EPA lists 7 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 |
|---|---|---|---|---|
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
All 7 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 Northglenn: frequently asked questions
Who runs City of Northglenn?
City of Northglenn (PWSID CO0101115) 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 Northglenn serve?
City of Northglenn reports serving 48,927 people through 10,203 service connections in Adams County, Colorado.
Where does City of Northglenn get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does City of Northglenn have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 1988. 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 Northglenn's 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. EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 1988. 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 Northglenn's water quality report?
As a community water system, City of Northglenn 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 Adams County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Thornton City of | Adams | 226,465 | Community | Surface water |
| Westminster City of | Adams | 202,078 | Community | Surface water |
| South Adams County Wsd | Adams | 75,559 | Community | Purchased surface water |
| Brighton City of | Adams | 56,304 | Community | Purchased surface water |
| Crestview Wsd | Adams | 23,756 | Community | Purchased surface water |
| North Washington Street Wsd | Adams | 14,500 | 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, “Northglenn City of, PWSID CO0101115, Colorado”, https://aquacensus.com/water-systems/colorado/northglenn-city-of-co0101115 (data as of October 1, 2026).