Berryessa Highlands
EPA ID: CA2810013 · 715 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Berryessa Highlands (CA2810013): 1 violation on record since 2021. Berryessa Highlands has 1 EPA violation on record, all marked resolved in the federal data; the utility serves 715 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Berryessa Highlands Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Berryessa Highlands have a median household income of $109,444 and about 64,552 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 70% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Berryessa Highlands's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in California
System Overview
Berryessa Highlands (EPA ID: CA2810013) is a community water system in California that serves approximately 715 people from surface water sources.
This system serves ZIP code 94558 in Napa.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 resolved, 1 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| August 1, 2024 | Revised Total Coliform Rule | Non-health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Revised Total Coliform Rule | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2023-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CA or modeled from parcel and building-footprint data.
- 94558 - Napa
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Berryessa Highlands (CA2810013) on EPA.gov.
Frequently Asked Questions
Is Berryessa Highlands water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Berryessa Highlands; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Berryessa Highlands serve?
Berryessa Highlands serves approximately 715 people across 1 ZIP code in California.
Where does Berryessa Highlands get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Berryessa Highlands (CA): 1 EPA Violation. https://zipcheckup.com/water-system/ca2810013/
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author = {{ZipCheckup}},
title = {{Berryessa Highlands (CA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca2810013/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Berryessa Highlands (EPA ID: CA2810013) - request the latest Consumer Confidence Report or ask about specific contaminants.