Public water system · CO0151600
ActiveChemical Materials Activity West
At a glance
Chemical Materials Activity West (PWSID CO0151600) is an active non-transient non-community water system in Pueblo County, Colorado. It reports serving 3,000 people through 51 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in March 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,000
Service connections
51
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Chemical Materials Activity West compare with other water systems in Pueblo County?
By EPA's size categories, Chemical Materials Activity West is a small system (501 to 3,300 people). Pueblo County has 27 active public water systems, and Chemical Materials Activity West is the 4th-largest of them by population served. Its population served is about half of the county average of 6,191 people per system, and accounts for 1.8% of the 167,168 people reported by systems filed under the county. Across Colorado, the 2,207 active systems average 3,400 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Chemical Materials Activity West is about 7 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Colorado has 183 active non-transient non-community water systems, 8.3% 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 Chemical Materials Activity West?
EPA lists Chemical Materials Activity West as owned by the federal 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 27 active systems in Pueblo County (3.7%) are also owned by the federal government.
Does Chemical Materials Activity West have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in March 2026. The violations listed here began between October 2013 and March 2026. By type: 6 monitoring and reporting, 4 monitoring, 1 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform Rule (4 of them). EPA lists 10 as resolved and 2 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2026-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Archived |
| 2025-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2025-08-16 | Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76 | Public Noticecode 7500 | No | Resolved |
| 2022-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2022-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2017-05-01 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2014-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | 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.
Chemical Materials Activity West: frequently asked questions
Who runs Chemical Materials Activity West?
Chemical Materials Activity West (PWSID CO0151600) is a non-transient non-community water system owned by the federal government. It is regulated by the CO state drinking water program.
How many people does Chemical Materials Activity West serve?
Chemical Materials Activity West reports serving 3,000 people through 51 service connections in Pueblo County, Colorado.
Where does Chemical Materials Activity West 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 Chemical Materials Activity West have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in March 2026. 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 Chemical Materials Activity West'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, one is health-based, and the most recent began in March 2026. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Chemical Materials Activity West's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Chemical Materials Activity West is a non-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 Pueblo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pueblo Board of Ww | Pueblo | 114,070 | Community | Surface water |
| Pueblo West Md | Pueblo | 30,000 | Community | Surface water |
| St Charles Mesa Wd | Pueblo | 9,690 | Community | Surface water |
| Colorado City Md | Pueblo | 2,755 | Community | Surface water |
| Avondale Wsd | Pueblo | 1,615 | Community | Groundwater |
| Circle K No 4062 | Pueblo | 756 | Transient non-community | 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, “Chemical Materials Activity West, PWSID CO0151600, Colorado”, https://aquacensus.com/water-systems/colorado/chemical-materials-activity-west-co0151600 (data as of October 1, 2026).