Public water system · CA0110800
ActiveChp - Mission Grade Scales
At a glance
Chp - Mission Grade Scales (PWSID CA0110800) is an active transient non-community water system in Alameda County, California. It reports serving 1,800 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list one violation for this system; it is health-based, and the most recent began in August 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,800
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Chp - Mission Grade Scales compare with other water systems in Alameda County?
By EPA's size categories, Chp - Mission Grade Scales is a small system (501 to 3,300 people). Alameda County has 27 active public water systems. Its population served is well below the county average of 83,320 people per system, and accounts for less than 0.1% of the 2,249,634 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 Chp - Mission Grade Scales is about 13 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 Chp - Mission Grade Scales?
EPA lists Chp - Mission Grade Scales as owned by a state 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. 1 of the 27 active systems in Alameda County (3.7%) are also owned by a state government.
Does Chp - Mission Grade Scales have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in August 2023. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Revised Total Coliform Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2023-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, E. coli (RTCR) · code 1A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
The one violation in EPA's records.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.
Chp - Mission Grade Scales: frequently asked questions
Who runs Chp - Mission Grade Scales?
Chp - Mission Grade Scales (PWSID CA0110800) is a transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Chp - Mission Grade Scales serve?
Chp - Mission Grade Scales reports serving 1,800 people through 1 service connection in Alameda County, California.
Where does Chp - Mission Grade Scales 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 Chp - Mission Grade Scales have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in August 2023. 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 Chp - Mission Grade Scales' 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 one violation for this system; it is health-based, and the most recent began in August 2023. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Chp - Mission Grade Scales' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Chp - Mission Grade Scales 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 Alameda County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| East Bay MUD | Alameda | 1,442,800 | Community | Surface water |
| Alameda County Water District | Alameda | 344,000 | Community | Surface water |
| City of Hayward | Alameda | 162,954 | Community | Purchased surface water |
| Dublin San Ramon Services District | Alameda | 98,776 | Community | Purchased surface water |
| City of Pleasanton | Alameda | 76,689 | Community | Purchased surface water |
| California Water Service - Livermore | Alameda | 60,414 | 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, “Chp - Mission Grade Scales, PWSID CA0110800, California”, https://aquacensus.com/water-systems/california/chp-mission-grade-scales-ca0110800 (data as of October 1, 2026).