San Juan Bautista, CA: 3 Health Violations — 66/100 (2026)
1 ZIP code · 5 water systems · Updated 2026-06-04
Based on current EPA data, San Juan Bautista, CA reflects fair but uneven tap water safety.
How San Juan Bautista Compares
Data: EPA SDWIS Last verified: 2026-06-04
San Juan Bautista Water: The Quick Version
- Your city's water systems recorded 7 violations in the past 5 years.
- Average lead level: 0.0013 mg/L.
- Homes built before 1986: 52% — older plumbing may contain lead solder.
- Estimated remediation: $2,200 per household.
- CDC health risk index: 10.93.
Water Systems Serving San Juan Bautista
San Juan Bautista, CA is covered by 3 major water utilities out of 5 federally tracked systems, each managing its own pipes, treatment processes, and EPA filings. What a household gets from the tap depends on which provider's system serves that address.
Overview
We track water quality and home safety data for 1 ZIP code in San Juan Bautista, California, covering 5 community water systems serving approximately 4,291 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 3 health-based violations documented.
Home Safety Score
Average Home Safety Score for San Juan Bautista: C (66/100)
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
San Juan Bautista water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0013 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)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Technique | 12 | 1 |
| Contaminant 1080 | Other | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 95045 | C | 7 | 3 | City of San Juan Bautista, |
All ZIP Codes in San Juan Bautista
- 95045 [C] — 7 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
Updated daily.
CDC Health Data for San Juan Bautista
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
Key Contaminants Detected in San Juan Bautista
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is San Juan Bautista's Housing Stock?
With 52% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Because the majority of San Juan Bautista's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1985 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in San Juan Bautista were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
San Juan Bautista: Remediation Cost in Perspective
Across San Juan Bautista, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.
Remediation costs in San Juan Bautista are relatively low compared to home values. The $1,100–$4,100 estimated range is a small fraction of median property value. Home values are 13% above the California average.
Protecting Children from Lead in San Juan Bautista
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.
Older stock in San Juan Bautista represents 52% of the inventory, and citywide monitoring runs at or above the federal action level — making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for San Juan Bautista
Within the NFIP's national dataset, San Juan Bautista falls in moderate-exposure territory — 14 documented incidents spanning multiple decades, with 100% of local ZIP codes sitting inside FEMA flood boundaries. That combination warrants inclusion in any thorough local water quality review.
San Juan Bautista has a moderate flood history with 14 FEMA claims averaging $5,697 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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>$2,200</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.
What You Can Do in San Juan Bautista
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Stage 2 DBP Rule can reduce the most common contaminant found in San Juan Bautista's water.
- Check your home's plumbing. With 52% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for San Juan Bautista, CA