Public water system · CO0101035
ActiveCottonwood MHP
At a glance
Cottonwood MHP (PWSID CO0101035) is an active community water system in Adams County, Washington. It reports serving 60 people through 30 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 5 violations for this system; none is health-based, and the most recent began in November 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
60
Service connections
30
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Cottonwood MHP compare with other water systems in Adams County?
By EPA's size categories, Cottonwood MHP is a very small system (500 people or fewer). Adams County has 49 active public water systems. Its population served is well below the county average of 525 people per system, and accounts for 0.2% of the 25,710 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active community water system reports serving 6,703 people, so Cottonwood MHP is well below 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. Washington has 2,392 active community water systems, 51% of the state's 4,705 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 130 Washington systems (2.8%) list purchased surface water as their primary source.
Who owns and regulates Cottonwood MHP?
EPA lists Cottonwood MHP as privately owned. 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. 39 of the 49 active systems in Adams County (80%) are also privately owned.
Does Cottonwood MHP have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in November 2024. The violations listed here began between May 1992 and November 2024. By type: 4 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2024-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-11-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2024-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 1994-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 5 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.
Cottonwood MHP: frequently asked questions
Who runs Cottonwood MHP?
Cottonwood MHP (PWSID CO0101035) is a community water system privately owned. It is regulated by the CO state drinking water program.
How many people does Cottonwood MHP serve?
Cottonwood MHP reports serving 60 people through 30 service connections in Adams County, Washington.
Where does Cottonwood MHP 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 Cottonwood MHP have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in November 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 Cottonwood MHP'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 5 violations for this system; none is health-based, and the most recent began in November 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 Cottonwood MHP's water quality report?
As a community water system, Cottonwood MHP 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 |
|---|---|---|---|---|
| Othello Water Department | Adams | 8,755 | Community | Groundwater |
| Hatton Coulee Rest Area | Adams | 3,882 | Transient non-community | Groundwater |
| Schrag Eb/Wb Rest Areas | Adams | 3,734 | Transient non-community | Groundwater |
| Ritzville Water Department | Adams | 1,725 | Community | Groundwater |
| Lind Town of | Adams | 903 | Community | Groundwater |
| Adams County Water Dist #1 | Adams | 870 | 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, “Cottonwood MHP, PWSID CO0101035, Washington”, https://aquacensus.com/water-systems/washington/cottonwood-mhp-co0101035 (data as of October 1, 2026).