Public water system · CA2300854
ActiveU.S. Army Corps-Lake Mendo (Kyen Cmpgrd)
At a glance
U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) (PWSID CA2300854) is an active transient non-community water system in Mendocino County, California. It reports serving 1,500 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,500
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) compare with other water systems in Mendocino County?
By EPA's size categories, U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) is a small system (501 to 3,300 people). Mendocino County has 144 active public water systems. Its population served is about 161% above the county average of 576 people per system, and accounts for 1.8% of the 82,868 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) is about 10 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. California has 3,016 active transient non-community water systems, 40% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates U.S. Army Corps-Lake Mendo (Kyen Cmpgrd)?
EPA lists U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) as owned by the federal government. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 144 active systems in Mendocino County (2.8%) are also owned by the federal government.
Does U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 2019. The violations listed here began between April 1999 and June 2019. By type: 2 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2019-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2000-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-04-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
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.
U.S. Army Corps-Lake Mendo (Kyen Cmpgrd): frequently asked questions
Who runs U.S. Army Corps-Lake Mendo (Kyen Cmpgrd)?
U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) (PWSID CA2300854) is a transient non-community water system owned by the federal government. It is regulated by the CA state drinking water program.
How many people does U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) serve?
U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) reports serving 1,500 people through 1 service connection in Mendocino County, California.
Where does U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) 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 U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 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 U.S. Army Corps-Lake Mendo (Kyen Cmpgrd)'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 June 2019. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find U.S. Army Corps-Lake Mendo (Kyen Cmpgrd)'s water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. U.S. Army Corps-Lake Mendo (Kyen Cmpgrd) 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 Mendocino County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ukiah, City of | Mendocino | 16,607 | Community | Surface water |
| Fort Bragg, City of | Mendocino | 6,919 | Community | Surface water |
| Willits, City of | Mendocino | 6,175 | Community | Surface water |
| Millview County Water District | Mendocino | 5,500 | Community | Surface water |
| Redwood Valley County Water District | Mendocino | 5,200 | Community | Surface water |
| Willow County Water District | Mendocino | 3,797 | 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, “U.S. Army Corps-Lake Mendo (Kyen Cmpgrd), PWSID CA2300854, California”, https://aquacensus.com/water-systems/california/u-s-army-corps-lake-mendo-kyen-cmpgrd-ca2300854 (data as of October 1, 2026).