Hidden Valley Lake, CA Water Safety: 82/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Across Hidden Valley Lake, EPA monitoring data shows low violation rates and healthy safety margins — a pattern that places the city well above CA's average for drinking water compliance across recent reporting cycles.
How Hidden Valley Lake Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Hidden Valley Lake Water
- Homes built before 1986: 32% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 14.48 — above typical levels.
Who Supplies Your Water in Hidden Valley Lake
With one provider handling most of Hidden Valley Lake's residential supply in CA, water service accountability is concentrated in a single utility among the 1 system on record.
Overview
We track water quality and home safety data for 1 ZIP code in Hidden Valley Lake, California, covering 1 community water system serving approximately 5,721 people.
No EPA violations recorded across any ZIP codes in Hidden Valley Lake — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Hidden Valley Lake: B (82/100)
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
Hidden Valley Lake water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Hidden Valley Lake
- 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 |
|---|---|---|---|
| 95467 | B | Hidden Valley Lake Csd | 6,235 |
All ZIP Codes in Hidden Valley Lake
- 95467 [B]
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 Hidden Valley Lake
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 Hidden Valley Lake
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
Development in Hidden Valley Lake unfolded across multiple decades, and the median build year of 1997 reflects a housing inventory where eras of construction are genuinely mixed — including portions that predate the federal prohibition on lead solder in plumbing.
Most homes in Hidden Valley Lake 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 Hidden Valley Lake Homeowners
Remediation costs in Hidden Valley Lake are small relative to typical property values — the cost-to-value ratio here is favorable.
Remediation costs in Hidden Valley Lake are relatively low compared to home values. The $800–$1,800 estimated range is a small fraction of median property value. Home values are 47% below the California average.
Lead Exposure Risk for Children in Hidden Valley Lake
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.
Locally, 32% of Hidden Valley Lake homes carry interior plumbing from the era when lead solder was still permitted in new builds, and citywide monitoring approaches or crosses the EPA action benchmark. Households can find a draw-test kit and certified filtration through verified retailers.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Hidden Valley Lake
A moderate NFIP record for Hidden Valley Lake — 37 insurance claims paired with 100% of ZIP codes in FEMA flood zones — points to a flood history where water-quality pathways have likely been periodically relevant.
Hidden Valley Lake has a moderate flood history with 37 FEMA claims averaging $13,809 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>$1,200</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.
Deep Dive Reports
Detailed analysis for Hidden Valley Lake, CA