San Joaquin, CA: 5 Health Violations - Home Safety 71/100
1 ZIP code · 1 water system · Updated
ZipCheckup grade for San Joaquin: B.
This ZIP looks solid, with a few items worth a quick check.
Your top priority: consider a certified water filter (5 health violations on record). NSF certified filters →
The water systems supplying San Joaquin show a track record of above-average compliance with federal standards - consistently among the better performers in CA.
How San Joaquin Compares
Data: EPA SDWIS
Key Facts for San Joaquin Residents
- Your city's water systems recorded 7 violations in the past 5 years.
- Homes built before 1986: 55% - older plumbing may contain lead solder.
- Estimated remediation: $2,900 per household.
- CDC health risk index: 12.33 - above typical levels.
San Joaquin's Water Providers
A single dominant system supplies most of San Joaquin, CA. That utility controls infrastructure decisions, rate structures, and EPA compliance reporting for most residential addresses served across those 1 tracked system.
- B
Overview
We track home safety data for 1 ZIP code in San Joaquin, California, covering 1 community water system serving approximately 4,062 people. 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. 5 health-based violations appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for San Joaquin: B (71/100)
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
San Joaquin water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0000 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
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 |
|---|---|---|---|
| Barium | Inorganic | 8 | 1 |
| Stage 2 DBP Rule | Treatment Technique | 4 | 1 |
| Stage 1 DBP Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 93660 | B | 7 | 5 | Tranquillity Irrigation District |
All ZIP Codes in San Joaquin
- 93660 [B] - 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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
San Joaquin Community Health Snapshot
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
What's in San Joaquin's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
San Joaquin Infrastructure Age
With 55% 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
When more than half a city's housing predates the 1986 federal ban on lead solder, plumbing-era lead risk becomes a citywide concern rather than an exception. San Joaquin's median build year of 1986 places it squarely in that category.
Over half of homes in San Joaquin 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.
How Remediation Costs Compare in San Joaquin
Looking at how documented remediation costs fit within San Joaquin property values, the equity share lands in the moderate tier - a finding that positions the household financial perspective between routine maintenance and a significant budget commitment, where most homeowners can successfully address documented issues by treating the expense as a planned financial priority rather than an unexpected one.
Remediation costs are moderate relative to home values in San Joaquin. The estimated $1,800–$4,800 range is manageable for most homeowners but still worth budgeting for. Home values are 63% below the California average.
San Joaquin: Lead Risk & Vulnerable Populations
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 55% 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 San Joaquin address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
San Joaquin: NFIP Claim Records and Water-Quality Context
Historical NFIP data for San Joaquin contains 4 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $123,434. 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. The <strong>$2,900</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
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 San Joaquin, CA