Herlong, CA Water Safety: 99/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Herlong tap water earns a high safety grade — above-average compliance with CA and federal standards.
How Herlong Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Herlong Residents
- Average lead level: 0.001 mg/L.
- Homes built before 1986: 96% — older plumbing may contain lead solder.
- CDC health risk index: 13.09 — above typical levels.
Herlong's Water Providers
Federal records track 1 water system in Herlong, CA, and a single provider handles the dominant share of residential connections while carrying primary responsibility for EPA compliance.
Overview
We track water quality and home safety data for 1 ZIP code in Herlong, California, covering 1 community water system serving approximately 2,310 people.
No EPA violations recorded across any ZIP codes in Herlong — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Herlong: A (99/100)
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
Herlong water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0010 mg/L (EPA action level: 0.015 mg/L)
- 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 |
|---|---|---|---|
| 96113 | A | Herlong Public Utility District | 2,114 |
All ZIP Codes in Herlong
- 96113 [A]
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.
Herlong 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
Herlong Infrastructure Age
With 96% 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
Pre-1986 plumbing is not a rare legacy case in Herlong — it's the dominant profile. The median build year of 1954 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in Herlong 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.
Herlong: 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 interior plumbing shapes the local picture: 96% of Herlong homes predate the federal solder ban, and aggregate sampling either approaches or crosses the action benchmark. That mix makes a single-home draw a standard pre-purchase or pre-occupancy step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Herlong, CA