Dinuba, CA: 1 Health Violation — 66/100 (2026)
1 ZIP code · 5 water systems · Updated 2026-06-03
Recent monitoring in Dinuba shows middle-tier safety for CA — some systems are clean; others have logged EPA violations.
How Dinuba Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Dinuba Water
- Your city's water systems recorded 2 violations in the past 5 years.
- Homes built before 1986: 59% — older plumbing may contain lead solder.
- Estimated remediation: $1,900 per household.
- CDC health risk index: 12.22 — above typical levels.
Who Supplies Your Water in Dinuba
Federal records list 5 water systems tied to Dinuba, CA. Of those, 3 are the primary providers, meaning service conditions, rate structures, and compliance histories can differ depending on where a property sits.
Overview
We track water quality and home safety data for 1 ZIP code in Dinuba, California, covering 5 community water systems serving approximately 32,223 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 1 health-based violation documented.
Home Safety Score
Average Home Safety Score for Dinuba: 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
Dinuba water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Dinuba
- 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 | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 93618 | C | 2 | 1 | City of Dinuba, |
All ZIP Codes in Dinuba
- 93618 [C] — 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
Updated daily.
Health Outcomes in Dinuba
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 Dinuba Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Dinuba
With 59% 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
Pre-1986 plumbing is not a rare legacy case in Dinuba — it's the dominant profile. The median build year of 1972 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in Dinuba 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 Dinuba Homeowners
Given current Dinuba valuations, the remediation-to-property-value ratio is low — most homeowners are looking at a proportionally modest share that fits within routine financial planning.
Remediation costs in Dinuba are relatively low compared to home values. The $950–$3,200 estimated range is a small fraction of median property value. Home values are 63% below the California average.
Lead Exposure Risk for Children in Dinuba
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.
In recent monitoring under the Lead and Copper Rule, citywide samples for Dinuba have approached or crossed the regulatory action level on multiple occasions. Combined with 59% of stock dating from the pre-rule era, the picture supports baseline single-tap reads as a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Dinuba
Across the NFIP's long tracking period, Dinuba shows 23 claims and 100% of ZIP codes within FEMA-designated flood zones — figures that place it in moderate flood exposure territory. At this level, the water-quality implications of flooding — contaminated wells, stressed treatment intake, distribution backflow — move from theoretical edge cases to genuine periodic risks, particularly during higher-severity events.
Dinuba has a moderate flood history with 23 FEMA claims averaging $1,962 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>$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.
What You Can Do in Dinuba
- 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 Dinuba's water.
- Check your home's plumbing. With 59% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Dinuba, CA