ZipCheckup grade for 95370: B.
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Sonora, CA (95370): PFAS Detected in Mapped Water Systems - 76/100
EPA data combined for 10 water systems mapped to this ZIP (largest mapped system: Tud - Sonora/jamestown Water System)
Health-based violation records by water system:
EPA records for the water systems mapped to 95370 in Sonora, CA contain 13 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 1 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 1 health-based violation and 12 non-health-based (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.
- Flood 14 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
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Although just one critical condition is documented for Sonora (95370), 1 elevated-risk finding accompany it in the dataset.
Score Breakdown
Overall Home Safety Score: 76/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (7) CRITICAL
Your Water System
ZIP code 95370 in Sonora, California is mapped to the water system Tud - Sonora/jamestown Water System (EPA ID: CA5510001). This system provides water to approximately 11,054 people from surface water sources.
There are 10 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Tud - Sonora/jamestown Water System | CA5510001 | 11,054 | Surface water |
| Tud - Columbia Water System | CA5510013 | 5,463 | Surface water |
| Sonora Meadows Mutual Wtr Company | CA5510023 | 1,123 | Surface water |
| Phoenix Lake Estates Cc Mwc | CA5510026 | 1,168 | Groundwater |
| Twain Harte Community Services District | CA5510005 | 2,378 | 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
- 95373 (Standard) - 2 mi
- 95372 (Soulsbyville) - 4 mi - 1 violation recorded for mapped water systems
- 95310 (Columbia) - 5 mi - 1 violation recorded for mapped water systems
- 95379 (Tuolumne) - 6 mi - 1 violation recorded for mapped water systems
- 95383 (Twain Harte) - 7 mi - 13 violations recorded for mapped water systems
- 95346 (Mi Wuk Village) - 10 mi - 12 violations recorded for mapped water systems
- 95309 (Chinese Camp) - 10 mi
- 95251 (Vallecito) - 10 mi - 4 violations recorded for mapped water systems
- 95327 (Jamestown) - 10 mi - 8 violations recorded for mapped water systems
- 95229 (Douglas Flat) - 10 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Tud - Sonora/jamestown Water System (CA5510001) on EPA.gov.
4 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 95370.
Detected compounds: PFPeA, PFHxA, PFBS.
Highest measured level: 0.0048 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 (11) HIGH
Home & Infrastructure (6) MODERATE
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 Sonora
Based on local data for ZIP 95370, 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 Sonora has 14 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)
Gutter Installation & Repair
The median home in 95370 was built around 1971. 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 Sonora is 1971; 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
Homes built around 1971 may be on their second or third roof. A professional inspection can catch damage before leaks start.
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 95370 safe to drink?
EPA SDWIS records 13 violations since 2021 across the water systems mapped to ZIP 95370 (primary system: Tud - Sonora/jamestown Water System), including 1 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 95370's water come from?
The recorded water source for Tud - Sonora/jamestown Water System, a system mapped to ZIP code 95370, is Surface water. This system serves approximately 11,054 people.
How does Sonora water compare to the national average?
Sonora's Home Safety Score ranks better than 56% of U.S. ZIP codes, and at or above 61% within California.
How can I get my water tested in Sonora?
If Tud - Sonora/jamestown Water System 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 95370?
95370 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Tuolumne 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 95370's water?
Yes, PFAS have been detected in samples from water systems mapped to 95370. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
What does the NFIP claim history show for ZIP 95370?
FEMA records contain 14 flood insurance claims filed in ZIP code 95370; the recorded rated-zone value (the most frequent one if there are several claims) is X, 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). Sonora, CA (95370): PFAS Detected in Mapped Water Systems - 76/100. https://zipcheckup.com/report/95370/
@misc{zipcheckup-report-95370,
author = {{ZipCheckup}},
title = {{Sonora, CA (95370): PFAS Detected in Mapped Water Systems - 76/100}},
year = {2026},
url = {https://zipcheckup.com/report/95370/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 95370
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 95373 | Standard, CA | 2.5 mi | N/A | 0 |
| 95372 | Soulsbyville, CA | 4.1 mi | B | 1 |
| 95310 | Columbia, CA | 4.7 mi | B | 1 |
| 95379 | Tuolumne, CA | 5.8 mi | B | 1 |
| 95383 | Twain Harte, CA | 7.3 mi | B | 13 |
| 95346 | Mi Wuk Village, CA | 9.9 mi | N/A | 12 |
| 95309 | Chinese Camp, CA | 10.2 mi | N/A | 0 |
| 95251 | Vallecito, CA | 10.2 mi | B | 4 |
| 95327 | Jamestown, CA | 10.3 mi | B | 8 |
| 95229 | Douglas Flat, CA | 10.4 mi | N/A | 0 |
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