Public water system · WA5302819
ActiveCh2o
At a glance
Ch2o (PWSID WA5302819) is an active non-transient non-community water system in Thurston County, Washington. It reports serving 51 people through 7 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 1998.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
51
Service connections
7
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Ch2o compare with other water systems in Thurston County?
By EPA's size categories, Ch2o is a very small system (500 people or fewer). Thurston County has 322 active public water systems. Its population served is well below the county average of 1,233 people per system, and accounts for less than 0.1% of the 397,060 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Ch2o is well below 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. Washington has 400 active non-transient non-community water systems, 8.5% of the state's 4,705 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,370 Washington systems (93%) list groundwater as their primary source.
Who owns and regulates Ch2o?
EPA lists Ch2o as privately owned. The WA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 237 of the 322 active systems in Thurston County (74%) are also privately owned.
Does Ch2o have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 1998. The violations listed here began between January 1997 and January 1998. By type: 3 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 1998-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1997-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1997-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 3 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.
Ch2o: frequently asked questions
Who runs Ch2o?
Ch2o (PWSID WA5302819) is a non-transient non-community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Ch2o serve?
Ch2o reports serving 51 people through 7 service connections in Thurston County, Washington.
Where does Ch2o 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 Ch2o have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 1998. 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 Ch2o'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 3 violations for this system; none is health-based, and the most recent began in January 1998. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Ch2o's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Ch2o 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 Thurston County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Olympia City of | Thurston | 126,966 | Community | Groundwater |
| Lacey Water Department | Thurston | 105,178 | Community | Groundwater |
| Tumwater City of | Thurston | 51,802 | Community | Groundwater |
| Yelm City of | Thurston | 17,355 | Community | Groundwater |
| Tanglewilde Thompson Place 600 | Thurston | 7,900 | Community | Groundwater |
| Pattison 500 | Thurston | 4,643 | 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, “Ch2o, PWSID WA5302819, Washington”, https://aquacensus.com/water-systems/washington/ch2o-wa5302819 (data as of October 1, 2026).