Hercules, CA (94547): PFAS Detected in Mapped Water Systems
EPA data combined for 3 water systems mapped to this ZIP (largest mapped system: East Bay Municipal Utility District)
EPA records for the water systems mapped to 94547 in Hercules, CA contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water No drinking-water violations in EPA records since 2021.
- Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
- PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
- Radon EPA Zone 2 - county-level radon potential, not a home measurement.
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With no critical conditions on file, the 1 high-priority alert represent the top tier for Hercules (94547).
Score Breakdown
Overall Home Safety Score: Score unavailable
Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.
Canonical components
Required domains
Coverage: 3 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (8) HIGH
Your Water System
ZIP code 94547 in Hercules, California is mapped to the water system East Bay Municipal Utility District (EPA ID: CA0110005). This system provides water to approximately 1,442,800 people from surface water sources.
There are 3 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| East Bay Municipal Utility District | CA0110005 | 1,442,800 | Surface water |
| City of Martinez | CA0710006 | 30,997 | Surface water |
| Contra Costa Water District | CA0710003 | 198,000 | Surface water |
Other Water Quality Reports in California
- 90001 (Los Angeles)
- 90002 (Los Angeles)
- 90003 (Los Angeles)
- 90004 (Los Angeles)
- 90005 (Los Angeles)
- 90006 (Los Angeles)
- 90007 (Los Angeles)
- 90008 (Los Angeles)
- 90009 (Los Angeles)
- 90010 (Los Angeles)
- 90011 (Los Angeles)
- 90012 (Los Angeles)
- 90013 (Los Angeles)
- 90014 (Los Angeles)
- 90015 (Los Angeles)
- 90016 (Los Angeles)
- 90017 (Los Angeles)
- 90018 (Los Angeles)
- 90019 (Los Angeles)
- 90020 (Los Angeles)
Nearby Water Quality Reports
- 94564 (Pinole) - 1 mi
- 94572 (Rodeo) - 2 mi
- 94820 (El Sobrante) - 3 mi
- 94803 (El Sobrante) - 3 mi
- 94525 (Crockett) - 4 mi
- 94806 (San Pablo) - 5 mi
- 94569 (Port Costa) - 5 mi
- 94805 (Richmond) - 6 mi
- 94592 (Vallejo) - 6 mi
- 94530 (El Cerrito) - 7 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for East Bay Municipal Utility District (CA0110005) on EPA.gov.
5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 94547.
Detected compounds: PFBA.
Highest measured level: 0.0052 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (10) HIGH
Home & Infrastructure (6) OK
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Hercules
Based on local data for ZIP 94547, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Gutter Installation & Repair
The median home in 94547 was built around 1982. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsWindow Replacement
The median build year of homes in Hercules is 1982; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.
Typical cost: Window replacement: typically $300–$800 per window installed
Estimate Your Home Maintenance CostsRoofing Inspection & Repair
Active weather alerts in California increase the risk of roof damage from hail and high winds. A professional inspection can identify vulnerabilities.
Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500
Estimate Your Home Insurance NeedsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 94547 safe to drink?
EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 94547 (primary system: East Bay Municipal Utility District), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 94547's water come from?
The recorded water source for East Bay Municipal Utility District, a system mapped to ZIP code 94547, is Surface water. This system serves approximately 1,442,800 people.
How can I get my water tested in Hercules?
If East Bay Municipal Utility District supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
What is the radon risk for 94547?
94547 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Contra Costa County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 94547's water?
Yes, PFAS have been detected in samples from water systems mapped to 94547. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
How to cite this page
ZipCheckup. (2026). Hercules, CA (94547): PFAS Detected in Mapped Water Systems. https://zipcheckup.com/report/94547/
@misc{zipcheckup-report-94547,
author = {{ZipCheckup}},
title = {{Hercules, CA (94547): PFAS Detected in Mapped Water Systems}},
year = {2026},
url = {https://zipcheckup.com/report/94547/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 94547
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 94564 | Pinole, CA | 1.5 mi | N/A | 0 |
| 94572 | Rodeo, CA | 1.7 mi | N/A | 0 |
| 94820 | El Sobrante, CA | 2.7 mi | N/A | 0 |
| 94803 | El Sobrante, CA | 3.0 mi | N/A | 0 |
| 94525 | Crockett, CA | 4.0 mi | N/A | 0 |
| 94806 | San Pablo, CA | 4.6 mi | N/A | 0 |
| 94569 | Port Costa, CA | 5.0 mi | N/A | 0 |
| 94805 | Richmond, CA | 5.6 mi | N/A | 0 |
| 94592 | Vallejo, CA | 6.2 mi | N/A | 0 |
| 94530 | El Cerrito, CA | 6.6 mi | N/A | 0 |
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