Jamul, CA: 6 Health Violations — 69/100 (2026)
1 ZIP code · 5 water systems · Updated 2026-06-03
Jamul lands near the CA median for water safety — compliance results are mixed, and the city's middle-grade standing reflects genuine variability across service areas rather than one problem driving the whole picture.
How Jamul Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Jamul Water
- Your city's water systems recorded 10 violations in the past 5 years.
- Average lead level: 0.004 mg/L.
- Homes built before 1986: 58% — older plumbing may contain lead solder.
- Estimated remediation: $600 per household.
- CDC health risk index: 10.18.
Who Supplies Your Water in Jamul
At present, 3 utilities serve the bulk of Jamul, CA's residential water connections out of 5 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 1 ZIP code in Jamul, California (population ~9,466), covering 5 community water systems serving approximately 252,018 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. 6 health-based violations documented.
Home Safety Score
Average Home Safety Score for Jamul: C (69/100)
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
Jamul water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0040 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Contaminant 4109 | Other | 10 | 1 |
| Combined Radium | Radionuclides | 2 | 1 |
| Stage 1 DBP Rule | Treatment Technique | 2 | 1 |
| Stage 2 DBP Rule | Treatment Technique | 2 | 1 |
| Consumer Confidence Report Rule | Reporting | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 91935 | C | 10 | 6 | OTAY WATER DISTRICT |
All ZIP Codes in Jamul
- 91935 [C] — 10 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.
Health Outcomes in Jamul
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
Top Contaminants in Jamul Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Jamul
With 58% 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
Heavily weighted toward older construction, Jamul's housing stock carries a median build year of 1986. That profile puts a majority of homes in the era when lead-soldered copper plumbing was standard practice.
Over half of homes in Jamul 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.
Cost Context: What Remediation Means for Jamul Homeowners
The household financial picture for Jamul homeowners is proportionally favorable — addressing documented issues claims a small slice of equity, and the cost-to-value ratio puts this area well within the manageable tier.
Remediation costs in Jamul are relatively low compared to home values. The $300–$1,500 estimated range is a small fraction of median property value. Home values are 14% above the California average.
Lead Exposure Risk for Children in Jamul
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.
When older housing represents 58% of the local inventory or aggregate readings approach the federal action level, an in-home check becomes the standard way to translate citywide averages into the specific reality of an individual Jamul address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Jamul
- 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 Contaminant 4109 can reduce the most common contaminant found in Jamul's water.
- Check your home's plumbing. With 58% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Jamul, CA