Public water system · CO0201008
ActiveBarr Lake State Park
At a glance
Barr Lake State Park (PWSID CO0201008) is an active transient non-community water system in Adams County, Colorado. It reports serving 609 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 11 violations for this system; 3 are health-based, and the most recent began in April 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
609
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Barr Lake State Park compare with other water systems in Adams County?
By EPA's size categories, Barr Lake State Park is a small system (501 to 3,300 people). Adams County has 82 active public water systems. Its population served is well below the county average of 8,669 people per system, and accounts for less than 0.1% 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 transient non-community water system reports serving 144 people, so Barr Lake State Park is about 4.2 times that figure.
What does “transient non-community water system” mean?
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. Colorado has 956 active transient non-community water systems, 43% of the state's 2,207 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,437 Colorado systems (65%) list groundwater as their primary source.
Who owns and regulates Barr Lake State Park?
EPA lists Barr Lake State Park as owned by a state 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. 1 of the 82 active systems in Adams County (1.2%) are also owned by a state government.
Does Barr Lake State Park have drinking water violations?
EPA's records list 11 violations for this system; 3 are health-based, and the most recent began in April 2019. The violations listed here began between January 1992 and April 2019. By type: 7 monitoring and reporting, 3 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2019-04-24 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2007-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2006-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 11 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.
Barr Lake State Park: frequently asked questions
Who runs Barr Lake State Park?
Barr Lake State Park (PWSID CO0201008) is a transient non-community water system owned by a state government. It is regulated by the CO state drinking water program.
How many people does Barr Lake State Park serve?
Barr Lake State Park reports serving 609 people through 4 service connections in Adams County, Colorado.
Where does Barr Lake State Park get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Barr Lake State Park have any drinking water violations?
EPA's records list 11 violations for this system; 3 are health-based, and the most recent began in April 2019. 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 Barr Lake State Park'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 11 violations for this system; 3 are health-based, and the most recent began in April 2019. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Barr Lake State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Barr Lake State Park is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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 |
| Northglenn City of | Adams | 48,927 | Community | Surface water |
| Crestview Wsd | Adams | 23,756 | 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, “Barr Lake State Park, PWSID CO0201008, Colorado”, https://aquacensus.com/water-systems/colorado/barr-lake-state-park-co0201008 (data as of October 1, 2026).