Stevenson Ranch, CA Water Safety: 63/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Within Stevenson Ranch, water safety data for CA reveals moderate quality — federal standards are generally met, but documented exceptions exist in specific service areas.
How Stevenson Ranch Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Stevenson Ranch Water
- Homes built before 1986: 9% — older plumbing may contain lead solder.
- Estimated remediation: $2,800 per household.
- CDC health risk index: 10.71.
Who Supplies Your Water in Stevenson Ranch
Water delivery in Stevenson Ranch, CA is handled by 2 utilities rather than a single system — drawn from 2 providers in federal records, each filing its own compliance reports and setting its own rates.
Overview
We track water quality and home safety data for 1 ZIP code in Stevenson Ranch, California (population ~21,857), covering 2 community water systems serving approximately 294,301 people region-wide.
No EPA violations recorded across any ZIP codes in Stevenson Ranch — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Stevenson Ranch: C (63/100)
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
Stevenson Ranch water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Stevenson Ranch
- 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.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 91381 | C | Santa Clarita Valley Water Agency | 294,090 |
All ZIP Codes in Stevenson Ranch
- 91381 [C]
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 Stevenson Ranch
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 Stevenson Ranch
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Compared to many older metro areas, Stevenson Ranch carries a relatively newer housing profile — the median build year of 1991 places most of the stock in the post-1986 era when lead solder was federally banned from new plumbing. That shift meaningfully reduces the baseline likelihood of lead leaching from copper joint solder. Homes from before 1986 do still exist in the mix, however, and individual testing remains the only way to confirm what a specific tap actually delivers.
Most homes in Stevenson Ranch 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 Stevenson Ranch Homeowners
In Stevenson Ranch, property wealth outpaces what documented remediation typically demands — the equity burden lands well within the low tier.
Remediation costs in Stevenson Ranch are relatively low compared to home values. The $1,600–$4,100 estimated range is a small fraction of median property value. Home values are 39% above the California average.
Lead Exposure Risk for Children in Stevenson Ranch
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.
Although citywide aggregate readings pass cleanly and just 9% of Stevenson Ranch housing comes from the pre-rule era, the difference between what utilities sample and what arrives at one specific faucet remains a structural feature of how monitoring works. Households with kids in the home can find a certified lead-removal filter and a draw-test kit through retailer-verified channels. That step is independent of system-level data.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Stevenson Ranch
Measured across the NFIP's multi-decade tracking period, Stevenson Ranch shows a moderate flood record — 1 claim and 100% of ZIP codes carrying FEMA flood zone status. For water quality, that combination matters because flood events at this frequency can periodically stress infrastructure: treatment plants, private wells, and distribution systems all face elevated risk during significant flooding.
Stevenson Ranch has a moderate flood history with 1 FEMA claims. 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>$2,800</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 Stevenson Ranch
- 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. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Stevenson Ranch, CA