Alameda County Water District
Drinking water quality, contact, and Consumer Confidence Report
Serving 4 cities in CA · PWSID CA0110001
Alameda County Water District serves 344,855 people. 1 contaminant currently exceed health-based guidelines — full breakdown below.
- People served
- 344,855
- Last EPA sample
- 2025-10-04
- PFAS
- Not detected above guidelines
- Health-based violations since 2020
- 0
Data sources: EPA SDWIS, Alameda County Water District's published Consumer Confidence Report, and compliance monitoring reported to EPA by CA State Water Resources Control Board, Div. of Drinking Water.
This page summarizes publicly available EPA and CCR records. For health decisions about your water, consult your utility or a licensed professional.
Official Alameda County Water District Resources
Alameda County Water District Service Area
Loading map...
This map shows the approximate service area for Alameda County Water District. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
Alameda County Water District Water Quality Grade
Not graded: Monitor
Alameda County Water District reads Monitor. A letter grade is given only beside a Safe verdict.
Is Alameda County Water District Water Safe to Drink?
Alameda County Water District has reported 1 contaminant above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.
This utility serves 344,855 people across 4 cities in CA. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
Get your water independently tested in California →How does California water quality rank nationally? →
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in California
Alameda County Water District Service Area
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
Free forever. Unsubscribe anytime. We never share your email.
Alameda County Water District Contact & Information
Phone
Mailing Address
B2B Contact Data
B2B Contact Data Available
Contacts for Alameda County Water District
| Name | Title | Phone | |
|---|---|---|---|
| J████ S████ | Water Treatment Supervisor | (555) ███-████ | j████@city████.gov |
| M████ J██████ | Utility Director | (555) ███-████ | m████@water████.org |
Water Sources & Treatment
Water Sources
Treatment Methods
Disinfectant Used
chloramines
Alameda County Water District Consumer Confidence Report
A Consumer Confidence Report (CCR) is the EPA-mandated annual water-quality report every community water system must publish by July 1 each year (Safe Drinking Water Act §1414(c)(4)). It summarizes contaminants tested, MCL and MCLG comparisons, and any system violations from the prior calendar year.
A current CCR for Alameda County Water District has not been published or validated on TapWaterData yet.
Residents: contact the utility directly using the phone number above, or check the EPA’s national CCR portal. Reports are typically distributed by mail or posted on the utility’s official website.
Alameda County Water District Annual Water Quality Reports
We don’t have a link we can confirm belongs to this system, and we’d rather show none than the wrong utility’s. CA State Water Resources Control Board, Div. of Drinking Water publishes drinking-water reports for systems in this state.
Visit CA State Water Resources Control Board, Div. of Drinking WaterWhat is a CCR? The Consumer Confidence Report (CCR) is an annual water quality report that water utilities are required by the EPA to provide to customers. It contains information about your water source, detected contaminants, and compliance status.
EPA Health-Based Violations Since 2020
Alameda County Water District has no health-based EPA violation since 2020 (EPA data as of Q2 2026).
EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Concerned about what's in your water?
You're viewing 1 contaminant above health-based guidelines here. Your own tap water can differ — upload your test (PDF or a photo) and we'll email a full plain-English reading of every number, free.
Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.
Upload my testRecommended Water Filters for Alameda County Water District
Based on water quality data from cities served by Alameda County Water District, we recommend NSF-certified filters that can remove contaminants above health guidelines.
Frequently Asked Questions about Alameda County Water District
Is Alameda County Water District water safe to drink?
Does Alameda County Water District have PFAS in its water?
How do I pay my Alameda County Water District water bill?
How many people does Alameda County Water District serve?
What cities does Alameda County Water District serve?
Does Alameda County Water District have any EPA violations?
What is Alameda County Water District's phone number?
Where can I find Alameda County Water District's Consumer Confidence Report?
Similar water utilities in California
How we built this page
Water-quality and contact data on this page comes from public federal and state records. We update each utility's record whenever its underlying source publishes new data — typically within days of an EPA SDWIS refresh.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: Alameda County Water District's most recent published Consumer Confidence Report (CCR), where available.
- Service area & contact: EPA SDWIS. The compliance records it holds for this system are reported to EPA by CA State Water Resources Control Board, Div. of Drinking Water, the state's drinking-water primacy agency.
Spotted a data issue? Use the Spotted something off? link at the bottom of the page — corrections feed back into the next data refresh. Learn more about TapWaterData.
Are you Alameda County Water District? Publish your 2027 CCR
TapWaterData runs a free CCR publishing service for community water systems. Claim this listing to publish your Consumer Confidence Report here — it inherits this page's search authority and reaches every customer who Googles Alameda County Water District.
- EPA-compliant distribution. Satisfies the 2027 Revised CCR Rule direct-URL requirement with an auditable archive.
- Publish once a year. Agent-assisted workflow; no login setup for small systems.
- Inherits this page's reach. Your published CCR appears directly on the page customers already find on Google.
Free for operators. No card required. Typical setup: 5 minutes.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach Alameda County Water District. For a problem with your water now (discolored water, no water, low pressure, a leak), contact Alameda County Water District directly.
Check another location
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
One email a week. Unsubscribe anytime.