Public water system · CO0150700
ActiveLamar City of
At a glance
City of Lamar (PWSID CO0150700) is an active community water system in Prowers County, Colorado. It reports serving 7,500 people through 3,425 service connections. Its primary water source is groundwater, 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 January 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,500
Service connections
3,425
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Lamar compare with other water systems in Prowers County?
By EPA's size categories, City of Lamar is a medium system (3,301 to 10,000 people). Prowers County has 10 active public water systems, and City of Lamar is the largest of them by population served. Its population served is about 6.4 times the county average of 1,167 people per system, and accounts for 64% of the 11,670 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 Lamar is about 12% 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. 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 City of Lamar?
EPA lists City of Lamar 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. 6 of the 10 active systems in Prowers County (60%) are also owned by a local government.
Does City of Lamar have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2015. The violations listed here began between January 2005 and January 2015. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Haloacetic acids (HAA5) (2 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 |
|---|---|---|---|---|
| 2015-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2014-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2014-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorocyclopentadienecode 2042 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dalaponcode 2031 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toxaphenecode 2020 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfoxidecode 2043 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfonecode 2044 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarbcode 2047 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Atrazinecode 2050 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endothallcode 2033 | 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 Lamar: frequently asked questions
Who runs City of Lamar?
City of Lamar (PWSID CO0150700) 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 Lamar serve?
City of Lamar reports serving 7,500 people through 3,425 service connections in Prowers County, Colorado.
Where does City of Lamar 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 City of Lamar 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 January 2015. 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 Lamar'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2015. 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 Lamar's water quality report?
As a community water system, City of Lamar 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 Prowers County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| May Valley Wa | Prowers | 1,500 | Community | Groundwater |
| Holly Town of | Prowers | 800 | Community | Groundwater |
| Granada Town of | Prowers | 515 | Community | Groundwater |
| Wiley Town of | Prowers | 405 | Community | Groundwater |
| Granada Rural Water Authority | Prowers | 378 | Community | Groundwater |
| Prosperity Lane Wa | Prowers | 260 | Community | Purchased groundwater |
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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, “Lamar City of, PWSID CO0150700, Colorado”, https://aquacensus.com/water-systems/colorado/lamar-city-of-co0150700 (data as of October 1, 2026).