Mountain Pass, CA: 1 Health Violation — 78/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Mountain Pass tap water earns a high safety grade — above-average compliance with CA and federal standards.
How Mountain Pass Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Mountain Pass Water
- Your city's water systems recorded 2 violations in the past 5 years.
- Average lead level: 0.0009 mg/L.
- Estimated remediation: $700 per household.
- CDC health risk index: 11.58.
Who Supplies Your Water in Mountain Pass
A single utility carries the primary residential water load in Mountain Pass, CA — the dominant provider across 1 federally tracked system.
Overview
We track water quality and home safety data for 1 ZIP code in Mountain Pass, California, covering 1 community water system serving approximately 626 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 1 health-based violation documented.
Home Safety Score
Average Home Safety Score for Mountain Pass: B (78/100)
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 Pass water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0009 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)
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 |
|---|---|---|---|---|
| 92366 | B | 2 | 1 | Mp Mine Operations Llc |
All ZIP Codes in Mountain Pass
- 92366 [B] — 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 Mountain Pass
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 Mountain Pass Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Lead Exposure Risk for Children in Mountain Pass
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 Pass 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.
Deep Dive Reports
Detailed analysis for Mountain Pass, CA