Hacienda Heights, CA Water Safety: 55/100 (2026)
1 ZIP code · 6 water systems · Updated 2026-06-04
Compliance figures for Hacienda Heights indicate average water quality in CA overall — some service areas have recorded health-based violations in recent monitoring cycles, while others operate cleanly, making system-level data the most actionable reference point for residents.
How Hacienda Heights Compares
Data: EPA SDWIS Last verified: 2026-06-04
Key Facts for Hacienda Heights Residents
- Homes built before 1986: 90% — older plumbing may contain lead solder.
- Estimated remediation: $2,100 per household.
- CDC health risk index: 10.71.
Hacienda Heights's Water Providers
Hacienda Heights, CA is covered by 3 major water utilities out of 6 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 Hacienda Heights, California (population ~54,996), covering 6 community water systems serving approximately 529,700 people region-wide.
No EPA violations recorded across any ZIP codes in Hacienda Heights — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Hacienda Heights: C (55/100)
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
Hacienda Heights water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Hacienda Heights
- 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 |
|---|---|---|---|
| 91745 | C | San Gabriel Valley Water Company-el Monte | 248,000 |
All ZIP Codes in Hacienda Heights
- 91745 [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.
Hacienda Heights 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
Hacienda Heights Infrastructure Age
With 90% 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
Lead solder was standard in copper plumbing until federally banned in 1986; lead pipes were common in service lines pre-1970. Hacienda Heights's median build year of 1961 reflects a housing stock where these older materials are a pervasive feature — not a rare legacy — of the residential plumbing landscape.
Over half of homes in Hacienda Heights 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.
How Remediation Costs Compare in Hacienda Heights
What does remediation cost in financial context for Hacienda Heights homeowners? Proportionally very little — the equity share here is low, and addressing documented issues is a manageable planning question rather than a material financial burden.
Remediation costs in Hacienda Heights are relatively low compared to home values. The $1,100–$3,400 estimated range is a small fraction of median property value. Home values are 5% above the California average.
Hacienda Heights: 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.
Older stock in Hacienda Heights represents 90% 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.
Hacienda Heights: Flood History & Water Damage Risk
Within the NFIP's national dataset, Hacienda Heights falls in moderate-exposure territory — 18 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.
Hacienda Heights has a moderate flood history with 18 FEMA claims averaging $3,296 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>$2,100</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 Hacienda Heights
- 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 90% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Hacienda Heights, CA