Mountain View, CA Water Safety: 75/100 (2026)
6 ZIP codes · 3 water systems · Updated 2026-06-03
Water systems serving Mountain View hold a strong EPA compliance record — the city places among the better-performing areas in CA with few health-based violations on file.
How Mountain View Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Mountain View, CA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Mountain View's 6 ZIP codes.
Key Facts for Mountain View Residents
- Average lead level: 0.0077 mg/L.
- Estimated remediation: $1,067 per household.
- CDC health risk index: 9.01.
Mountain View's Water Providers
Residential water in Mountain View, CA is supplied by 3 separate utilities — not one centralized authority. Each of those providers operates under its own service territory boundary, maintains its own distribution infrastructure, and files compliance documentation with the EPA on its own timeline. Federal data counts 3 water systems in the area, with these providers collectively accounting for the dominant share of household connections.
Overview
We track water quality and home safety data for 6 ZIP codes in Mountain View, California (population ~83,464), covering 3 community water systems serving approximately 306,298 people region-wide.
No EPA violations recorded across any ZIP codes in Mountain View — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Mountain View: B (75/100)
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
Mountain View water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0077 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 6 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 94035 | B | City of Mountain View | 81,501 |
| 94039 | B | City of Mountain View | 81,501 |
| 94040 | B | City of Mountain View | 81,501 |
| 94041 | B | City of Mountain View | 81,501 |
| 94042 | B | City of Mountain View | 81,501 |
| 94043 | B | City of Mountain View | 81,501 |
All ZIP Codes in Mountain View
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.
Mountain View 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
How Remediation Costs Compare in Mountain View
Placing remediation in the context of Mountain View's property market, the equity share is low — most homeowners here are weighing a financial commitment that fits comfortably within routine property planning, far from the threshold where remediation becomes a material equity decision rather than a standard upkeep consideration.
Remediation costs in Mountain View are relatively low compared to home values. The $433–$1,783 estimated range is a small fraction of median property value. Home values are 171% above the California average.
Mountain View: 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.
Lead risk in Mountain View appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Mountain View: Flood History & Water Damage Risk
Mountain View's flood exposure sits in the moderate range: 10 NFIP claims on record and 33% of ZIP codes within FEMA-designated flood zones. Residents with private wells or older infrastructure have reasonable grounds to factor flood timing into their water quality awareness.
Mountain View has a moderate flood history with 10 FEMA claims averaging $1,689 per payout. 33% 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>$1,067</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 Mountain View, CA