Guerneville, CA: 2 Violations - Home Safety 100/100
1 ZIP code · 5 water systems · Updated
ZipCheckup grade for Guerneville: A.
Checked records flag no major concern; missing data is unknown.
In the dataset behind this page, Guerneville, CA receives one of the two highest grades; read the compliance history system by system for details.
How Guerneville Compares
Data: EPA SDWIS
Key Facts for Guerneville Residents
- Your city's water systems recorded 2 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0032 mg/L.
- Homes built before 1986: 81% - older plumbing may contain lead solder.
- Health risk index (ZipCheckup composite of CDC data): 11.32.
Guerneville's Water Providers
More than one public water system is linked to Guerneville, CA: federal records tie 5 systems to the area, and the 3 with the largest reported service populations are shown below. Which of them supplies a particular address depends on where the property sits, and a water bill or the utility can confirm it.
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Overview
We track home safety data for 1 ZIP code in Guerneville, California (population ~4,808), covering 5 community water systems serving approximately 17,411 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Guerneville: A (100/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Guerneville water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0032 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
1 of 1 ZIP records with known zones is in EPA Radon Zone 3.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 2 | 1 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 95446 | A | 2 | 0 | Sweetwater Springs Cwd - Guerneville |
All ZIP Codes in Guerneville
- 95446 [A] - 2 violations
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Guerneville Community Health Snapshot
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Guerneville's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Guerneville Infrastructure Age
With 81% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
If you live in one of the pre-1986 homes in Guerneville, a certified lab test for lead is the direct way to learn what your tap delivers; the median build year of 1952 is only context.
Over half of homes in Guerneville were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Guerneville: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Guerneville: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Guerneville contains 3,952 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $20,486. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
Deep Dive Reports
Detailed analysis for Guerneville, CA