Public water system · CA1210013
ActiveHumboldt Bay Mwd
At a glance
Humboldt Bay Mwd (PWSID CA1210013) is an active community water system in Humboldt County, California. It reports serving 680 people through 217 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in June 1993.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
680
Service connections
217
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Humboldt Bay Mwd compare with other water systems in Humboldt County?
By EPA's size categories, Humboldt Bay Mwd is a small system (501 to 3,300 people). Humboldt County has 90 active public water systems. Its population served is about half of the county average of 1,486 people per system, and accounts for 0.5% of the 133,779 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Humboldt Bay Mwd 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. California has 2,997 active 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 Humboldt Bay Mwd?
EPA lists Humboldt Bay Mwd as privately owned. 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. 41 of the 90 active systems in Humboldt County (46%) are also privately owned.
Does Humboldt Bay Mwd have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in June 1993. By type: 1 required treatment not met. The contaminant or rule involved is Surface Water Treatment 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 |
|---|---|---|---|---|
| 1993-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | 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.
Humboldt Bay Mwd: frequently asked questions
Who runs Humboldt Bay Mwd?
Humboldt Bay Mwd (PWSID CA1210013) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Humboldt Bay Mwd serve?
Humboldt Bay Mwd reports serving 680 people through 217 service connections in Humboldt County, California.
Where does Humboldt Bay Mwd 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 Humboldt Bay Mwd have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in June 1993. 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 Humboldt Bay Mwd'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 one violation for this system; it is health-based, and the most recent began in June 1993. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Humboldt Bay Mwd's water quality report?
As a community water system, Humboldt Bay Mwd 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 Humboldt County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Eureka, City of | Humboldt | 27,078 | Community | Purchased groundwater |
| Arcata, City of | Humboldt | 20,875 | Community | Purchased groundwater |
| Humboldt C.S.D. | Humboldt | 19,807 | Community | Groundwater |
| Mckinleyville C.S.D. | Humboldt | 16,900 | Community | Purchased groundwater |
| Fortuna, City of | Humboldt | 12,133 | Community | Groundwater |
| Rio Dell, City of | Humboldt | 3,300 | Community | 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, “Humboldt Bay Mwd, PWSID CA1210013, California”, https://aquacensus.com/water-systems/california/humboldt-bay-mwd-ca1210013 (data as of October 1, 2026).