Riverdale Public Utility District
EPA ID: CA1010028 · 2,756 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Riverdale Public Utility District (CA1010028): no drinking-water violations recorded since 2021. EPA lists no violations for Riverdale Public Utility District, serving 2,756 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Riverdale Public Utility District Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Riverdale Public Utility District have a median household income of $66,468 and about 11,295 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 75% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 62% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Riverdale Public Utility District's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in California
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Riverdale Public Utility District (EPA ID: CA1010028) is a community water system in California that serves approximately 2,756 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0057 mg/L | No | 2024-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
2 of 2 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Riverdale Public Utility District (CA1010028) on EPA.gov.
Frequently Asked Questions
Is Riverdale Public Utility District water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Riverdale Public Utility District in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Riverdale Public Utility District serve?
Riverdale Public Utility District serves approximately 2,756 people across 2 ZIP codes in California.
Where does Riverdale Public Utility District get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Riverdale Public Utility District Water Quality Report, CA. https://zipcheckup.com/water-system/ca1010028/
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title = {{Riverdale Public Utility District Water Quality Report, CA}},
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