Watsonville, CA Water Safety: 76/100 (2026)
2 ZIP codes · 12 water systems · Updated 2026-06-03
Drinking water tracked for Watsonville by CA authorities posts above-average scores — the majority of systems are free from health-based exceedances and the city's grade sits above the state median.
How Watsonville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Watsonville Water: The Quick Version
- Average lead level: 0.0021 mg/L.
- Estimated remediation: $1,900 per household.
- CDC health risk index: 10.85.
Water Systems Serving Watsonville
Residential addresses in Watsonville, CA are served by 3 primary water providers out of 12 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 2 ZIP codes in Watsonville, California, covering 12 community water systems serving approximately 82,409 people.
No EPA violations recorded across any ZIP codes in Watsonville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Watsonville: B (76/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Watsonville water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0021 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 2 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 95076 | C | City of Watsonville, | 65,231 |
| 95077 | B | City of Watsonville, | 65,231 |
All ZIP Codes in Watsonville
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
Updated daily.
CDC Health Data for Watsonville
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Watsonville: Remediation Cost in Perspective
Low proportionality — that's the Watsonville picture when remediation costs are placed against typical home equity.
Remediation costs in Watsonville are relatively low compared to home values. The $1,000–$2,850 estimated range is a small fraction of median property value. Home values are 4% above the California average.
Protecting Children from Lead in Watsonville
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Watsonville appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Watsonville
Because Watsonville's NFIP claim count reaches 562 and 50% of ZIP codes fall within FEMA-designated flood zones, flood exposure here operates differently than it does in lower-claim communities. In areas with isolated flood events, water-quality infrastructure can typically absorb the stress and recover between events. In communities with repeated high-volume flooding, treatment plants face recurring overload conditions, private wells in FEMA-designated zones accumulate repeated infiltration episodes, and distribution systems experience repeated pressure events that can drive backflow. The claim record for this area points to that second category: a flood environment where water infrastructure stress is periodic and documented, not theoretical.
Watsonville has a significant flood history with 562 FEMA flood insurance claims on record, averaging $36,200 per claim. With 50% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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. Flood damage can add significantly to the estimated <strong>$1,900</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Watsonville, CA