Mt Baldy, CA Water Safety: 63/100 (2026)
1 ZIP code · 4 water systems · Updated 2026-06-03
Within Mt Baldy, water safety data for CA reveals moderate quality — federal standards are generally met, but documented exceptions exist in specific service areas.
How Mt Baldy Compares
Data: EPA SDWIS Last verified: 2026-06-03
Mt Baldy Water: The Quick Version
- Homes built before 1986: 77% — older plumbing may contain lead solder.
- Estimated remediation: $1,600 per household.
- CDC health risk index: 11.58.
Water Systems Serving Mt Baldy
Mt Baldy, CA is covered by 3 major water utilities out of 4 federally tracked systems, each managing its own pipes, treatment processes, and EPA filings. What a household gets from the tap depends on which provider's system serves that address.
Overview
We track water quality and home safety data for 1 ZIP code in Mt Baldy, California (population ~290), covering 4 community water systems serving approximately 3,915,296 people region-wide.
No EPA violations recorded across any ZIP codes in Mt Baldy — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Mt Baldy: 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
Mt Baldy water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Mt Baldy
- 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 |
|---|---|---|---|
| 91759 | C | Gswc - Claremont | 39,730 |
All ZIP Codes in Mt Baldy
- 91759 [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.
CDC Health Data for Mt Baldy
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 Old Is Mt Baldy's Housing Stock?
With 77% 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
When more than half a city's housing predates the 1986 federal ban on lead solder, plumbing-era lead risk becomes a citywide concern rather than an exception. Mt Baldy's median build year of 1941 places it squarely in that category.
Over half of homes in Mt Baldy were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Mt Baldy: Remediation Cost in Perspective
Across Mt Baldy, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.
Remediation costs in Mt Baldy are relatively low compared to home values. The $800–$2,600 estimated range is a small fraction of median property value. Home values are 54% below the California average.
Protecting Children from Lead in Mt Baldy
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.
Older stock in Mt Baldy represents 77% of the inventory, and citywide monitoring runs at or above the federal action level — making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Mt Baldy
Within the NFIP's national dataset, Mt Baldy falls in moderate-exposure territory — 4 documented incidents spanning multiple decades, with 100% of local ZIP codes sitting inside FEMA flood boundaries. That combination warrants inclusion in any thorough local water quality review.
Mt Baldy has a moderate flood history with 4 FEMA claims averaging $314 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>$1,600</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 Mt Baldy
- 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. With 77% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Mt Baldy, CA