Humboldt Bay Mwd
EPA ID: CA1210013 · 680 people served · 12 ZIP codes
ZipCheckup's reading of EPA SDWIS for Humboldt Bay Mwd (CA1210013): no EPA violations recorded in the last five years. With a five-year violation-free history, Humboldt Bay Mwd delivers safe water to 680 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Humboldt Bay Mwd Source: EPA SDWIS service area boundaries.
Service area boundary - Grade A
Service Area Demographics
The Humboldt Bay Mwd serves a community with a median household income of $72,808 and an estimated 97,738 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Humboldt Bay Mwd's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in California
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Humboldt Bay Mwd (EPA ID: CA1210013) is a community water system in California that serves approximately 680 people from groundwater sources.
This system provides water to 12 ZIP codes across 11 communities.
ZIP-Area Home Safety Context: A (99/100)
This is the average Home Safety Score for 7 of 12 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0016 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CA or modeled from parcel and building-footprint data.
- 95501 - Eureka
- 95503 - Eureka
- 95519 - Mckinleyville
- 95521 - Arcata
- 95524 - Bayside
- 95525 - Blue Lake
- 95537 - Fields Landing
- 95549 - Kneeland
- 95550 - Korbel
- 95551 - Loleta
- 95564 - Samoa
- 95570 - Trinidad
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Humboldt Bay Mwd (CA1210013) on EPA.gov.
Frequently Asked Questions
Is Humboldt Bay Mwd water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Humboldt Bay Mwd in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Humboldt Bay Mwd serve?
Humboldt Bay Mwd serves approximately 680 people across 12 ZIP codes in California.
Where does Humboldt Bay Mwd get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Humboldt Bay Mwd Water Quality Report, CA. https://zipcheckup.com/water-system/ca1210013/
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title = {{Humboldt Bay Mwd Water Quality Report, CA}},
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url = {https://zipcheckup.com/water-system/ca1210013/}
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