Ripon, CA Water Safety: 88/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
For households in Ripon, CA water data shows a consistently above-average safety picture.
How Ripon Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Ripon Water
- Homes built before 1986: 42% — older plumbing may contain lead solder.
- Estimated remediation: $600 per household.
- CDC health risk index: 11.38.
Who Supplies Your Water in Ripon
Residential addresses in Ripon, CA are served by 3 primary water providers out of 3 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 1 ZIP code in Ripon, California (population ~18,440), covering 3 community water systems serving approximately 100,694 people region-wide.
No EPA violations recorded across any ZIP codes in Ripon — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Ripon: A (88/100)
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
Ripon water systems draw from: Groundwater, Surface water.
Lead & Copper
- Lead data: not yet available for Ripon
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 95366 | A | City of Ripon, | 15,741 |
All ZIP Codes in Ripon
- 95366 [A]
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 Ripon
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
Housing & Infrastructure in Ripon
With 42% 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
Tap water lead levels are shaped by two factors: what the utility delivers, and what the household plumbing adds to it. Older homes contribute disproportionately to that second variable because lead solder was standard in copper plumbing before 1986, and lead pipes were common before 1970. In Ripon, where the median build year is 1998, a substantial share of the housing stock falls into these older categories. The bar chart above breaks out the pre-1970, 1970-to-1986, and post-1986 segments — the key ages for understanding where plumbing-era risk concentrates across the city.
Most homes in Ripon were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Ripon Homeowners
In Ripon, documented water and safety issues can be addressed without making a meaningful dent in home equity — the financial proportionality here is favorable, and the commitment fits within standard property planning frameworks.
Remediation costs in Ripon are relatively low compared to home values. The $400–$800 estimated range is a small fraction of median property value. Home values are 9% below the California average.
Lead Exposure Risk for Children in Ripon
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.
Before the federal solder ban, lead solder was a routine plumbing material, and 42% of the Ripon inventory was built in that earlier era — a share large enough to move household-level reads onto the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Ripon, CA