Discovery Bay, CA (94505) Home Safety Report
EPA data for Town of Discovery Bay
EPA records for the water systems mapped to 94505 in Discovery Bay, 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.
- Radon EPA Zone 2 - county-level radon potential, not a home measurement.
- Flood 21 cumulative NFIP claim records. Check the current FEMA map for a specific address.
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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 (7) MODERATE
Your Water System
ZIP code 94505 in Discovery Bay, California is mapped to the water system Town of Discovery Bay (EPA ID: CA0710009). This system provides water to approximately 16,790 people from groundwater sources.
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Nearby Water Quality Reports
- 94513 (Brentwood) - 5 mi
- 94514 (Byron) - 5 mi
- 94548 (Knightsen) - 6 mi
- 94561 (Oakley) - 8 mi
- 94511 (Bethel Island) - 9 mi
- 95208 (Stockton) - 9 mi
- 95391 (Tracy) - 10 mi
- 95234 (Holt) - 10 mi
- 94531 (Antioch) - 10 mi
- 94509 (Antioch) - 13 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Town of Discovery Bay (CA0710009) 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.
UCMR 5 PFAS monitoring: no reportable detections in available records
Available federal UCMR5 records for water systems mapped to ZIP code 94505 show no PFAS detections among the compounds tested, at the program's reporting levels.
The EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5) required community and non-transient non-community water systems serving 3,300 or more people to test for 29 PFAS compounds and lithium between 2023 and 2025. Systems with no detections at the federal minimum reporting level had no results at or above that reporting level.
Environmental Hazards (11) HIGH
Home & Infrastructure (6) OK
Cost & Community (8) OK
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Discovery Bay
Based on local data for ZIP 94505, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Home & Flood Insurance
The ZIP code for this report in Discovery Bay has 21 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.
Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote
Check Your Flood Zone (Free)FEMA flood map lookup - see if your property is in a flood zone
Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)
Roofing 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 94505 safe to drink?
EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 94505 (primary system: Town of Discovery Bay), 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 94505's water come from?
The recorded water source for Town of Discovery Bay, a system mapped to ZIP code 94505, is Groundwater. This system serves approximately 16,790 people.
How can I get my water tested in Discovery Bay?
If Town of Discovery Bay 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 94505?
94505 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.
What does the NFIP claim history show for ZIP 94505?
FEMA records contain 21 flood insurance claims filed in ZIP code 94505; the recorded rated-zone value (the most frequent one if there are several claims) is C, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Discovery Bay, CA (94505) Home Safety Report. https://zipcheckup.com/report/94505/
@misc{zipcheckup-report-94505,
author = {{ZipCheckup}},
title = {{Discovery Bay, CA (94505) Home Safety Report}},
year = {2026},
url = {https://zipcheckup.com/report/94505/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 94505
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 94513 | Brentwood, CA | 5.1 mi | N/A | 0 |
| 94514 | Byron, CA | 5.2 mi | N/A | 0 |
| 94548 | Knightsen, CA | 6.0 mi | N/A | 0 |
| 94561 | Oakley, CA | 8.5 mi | N/A | 0 |
| 94511 | Bethel Island, CA | 9.1 mi | N/A | 0 |
| 95208 | Stockton, CA | 9.5 mi | N/A | 0 |
| 95391 | Tracy, CA | 9.6 mi | A | 0 |
| 95234 | Holt, CA | 10.1 mi | N/A | 0 |
| 94531 | Antioch, CA | 10.4 mi | N/A | 0 |
| 94509 | Antioch, CA | 12.9 mi | N/A | 0 |
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