Boonville, CA: Lead Above EPA Limits — 70/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
Water utilities in Boonville have maintained a consistent compliance record over recent monitoring periods — the city's above-average grade in CA reflects low violation rates and no systemic health concerns flagged in current data.
How Boonville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Boonville Residents
- Average lead level: 0.022 mg/L — exceeds the EPA action level of 0.015 mg/L.
- Homes built before 1986: 60% — older plumbing may contain lead solder.
- Estimated remediation: $4,800 per household.
- CDC health risk index: 13.81 — above typical levels.
Boonville's Water Providers
Water service in Boonville, CA is split across 3 utilities out of 3 tracked federally, each operating its own infrastructure and compliance record.
Overview
We track water quality and home safety data for 1 ZIP code in Boonville, California (population ~1,296), covering 3 community water systems serving approximately 9,397 people region-wide.
No EPA violations recorded across any ZIP codes in Boonville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Boonville: B (70/100)
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
Boonville water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0220 mg/L (exceeds EPA action level) (EPA action level: 0.015 mg/L)
- 1 ZIP code 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 |
|---|---|---|---|
| 95415 | B | Millview County Water District | 5,500 |
All ZIP Codes in Boonville
- 95415 [B]
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.
Boonville 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
Boonville Infrastructure Age
With 60% 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
While newer cities carry lower aggregate plumbing risk from lead-era construction, Boonville sits firmly in the older category. The median build year of 1962 indicates that more than half the housing stock was built before 1986, when lead solder was still legally used in residential copper plumbing — and a substantial portion likely predates 1970, when lead pipes were still commonly installed for service lines. These two thresholds together define the elevated plumbing risk environment that older housing cities carry, independent of what the municipal water supply delivers to the meter.
Over half of homes in Boonville 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 Boonville
When estimated remediation is placed alongside median property values in Boonville, the resulting ratio is low — a finding consistent with a household financial perspective where documented issues can be addressed without a meaningful impact on overall equity position, making this market one of the more favorable contexts for remediation planning.
Remediation costs in Boonville are relatively low compared to home values. The $3,200–$6,600 estimated range is a small fraction of median property value. Home values are 14% below the California average.
Boonville: 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.
Locally for Boonville, the pre-rule housing share runs at 60%, and citywide utility monitoring has moved past the federal action mark. The high pre-1986 share combined with system samples crossing threshold places lead among the higher-priority household water concerns. Families with kids or pregnant residents can find a draw-test kit and certified filter via retailer-verified channels, with periodic retesting capturing changes after plumbing work or extended stagnation.
<strong>1 ZIP code</strong> (100% of the city) exceeds the EPA lead action level of 0.015 mg/L.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Boonville: Flood History & Water Damage Risk
Boonville's flood exposure sits in the moderate range: 1 NFIP claim on record and 100% 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.
Boonville has a moderate flood history with 1 FEMA claims averaging $18,567 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>$4,800</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 Boonville, CA