City of Riverside,
EPA ID: CA3310031 · 298,398 people served · 24 ZIP codes
Throughout five consecutive years of federal water monitoring, City of Riverside, recorded zero violations — solid performance for a utility serving 298,398 people.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 94% chance of violation in next 12 months
Violations went from 2 (2024) to 2 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for City of Riverside, Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Riverside, serves a community with a median household income of $91,862 and an estimated 699,221 residents across its service area. Approximately 59% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 44% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. 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?
City of Riverside,'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.
About 1% of homes in Riverside County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 82 detections recorded. 8 exceed federal EPA limits (4 ppt for PFOA/PFOS). 6 exceed state limits.
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
RIVERSIDE, CITY OF (EPA ID: CA3310031) is a community water system in California that serves approximately 298,398 people from surface water sources.
This system provides water to 24 ZIP codes across 7 communities.
Average Home Safety Score: B (81/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 92501 | 0.0003 mg/L | No | N/A |
| 92502 | 0.0003 mg/L | No | N/A |
| 92503 | 0.0003 mg/L | No | N/A |
| 92504 | 0.0003 mg/L | No | N/A |
| 92505 | 0.0003 mg/L | No | N/A |
| 92506 | 0.0003 mg/L | No | N/A |
| 92507 | 0.0003 mg/L | No | N/A |
| 92508 | 0.0003 mg/L | No | N/A |
| 92509 | 0.0003 mg/L | No | N/A |
| 92513 | 0.0003 mg/L | No | N/A |
| 92514 | 0.0003 mg/L | No | N/A |
| 92515 | 0.0003 mg/L | No | N/A |
| 92516 | 0.0003 mg/L | No | N/A |
| 92517 | 0.0003 mg/L | No | N/A |
| 92519 | 0.0003 mg/L | No | N/A |
| 92521 | 0.0003 mg/L | No | N/A |
| 92522 | 0.0003 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 14 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 10 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 91752 — Mira Loma
- 92324 — Colton
- 92501 — Riverside
- 92502 — Riverside
- 92503 — Riverside
- 92504 — Riverside
- 92505 — Riverside
- 92506 — Riverside
- 92507 — Riverside
- 92508 — Riverside
- 92509 — Riverside
- 92513 — Riverside
- 92514 — Riverside
- 92515 — Riverside
- 92516 — Riverside
- 92517 — Riverside
- 92518 — March Air Reserve Base
- 92519 — Riverside
- 92521 — Riverside
- 92522 — Riverside
- 92557 — Moreno Valley
- 92860 — Norco
- 92879 — Corona
- 92881 — Corona
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Riverside, (CA3310031) on EPA.gov.
Frequently Asked Questions
Is City of Riverside, water safe to drink?
Based on EPA records, City of Riverside, has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does City of Riverside, serve?
City of Riverside, serves approximately 298,398 people across 24 ZIP codes in California.
Where does City of Riverside, get its water?
The primary water source is surface water.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from RIVERSIDE PUBLIC UTILITIES Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: RIVERSIDE PUBLIC UTILITIES Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
An assessment of these drinking water sources for the City of Riverside was completed in May 2013.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment chemicals and what each one does
Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.
Watershed exposure sources reported
Land-use and natural conditions identified in the utility's source-water assessment as potential contamination sources upstream of treatment.
Treatment classification and chemical list sourced from RIVERSIDE PUBLIC UTILITIES Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
PFAS Substances Detected in This System
This water system's Consumer Confidence Report disclosed the following PFAS compounds. Levels are from the utility's most recent reporting cycle.
In April 2024, EPA finalized the first National Primary Drinking Water Regulation for six PFAS. Public water systems have until 2029 to comply. EPA — PFAS regulation overview →
Source: Consumer Confidence Report disclosed by RIVERSIDE PUBLIC UTILITIES.
ZipCheckup is not affiliated with this water utility. PFAS detection data is sourced from public Consumer Confidence Reports filed by the utility itself.
Riverside Public Utilities has replaced all its known lead service lines. New Lead and Copper Rule Revisions (LCRR) require community water systems to conduct an inventory of service linesconnected to the water system's distribution system, regardless of ownership status, to determine the materials of those lines. Riverside Public Utilities is in the process of collecting service line material information for the private-side portion of the water service line.
Lead Service Line Replacement Tracker
This water utility's lead service line (LSL) replacement program is tracked from public Consumer Confidence Report filings. Email signup notifies subscribers when the utility files an updated replacement plan or progress milestone.
RIVERSIDE PUBLIC UTILITIES
ZipCheckup is not affiliated with this water utility. LSL replacement-program data is sourced from public CCR filings published by the utility. Subscription notifications are based on automated parsing of subsequent CCR releases.
Learn more about Lead and Copper Rule replacement requirements →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Aesthetic water quality
These measurements describe the look, taste, and feel of the water this utility delivers. They are not contaminant violations — they sit alongside federal Secondary Maximum Contaminant Levels (SMCLs) which the EPA publishes as non-enforceable guidance.
Aesthetic measurements from RIVERSIDE PUBLIC UTILITIES Consumer Confidence Report.
Aesthetic measurements are reported by the utility from its annual sampling. EPA Secondary MCLs are advisory thresholds — values outside them indicate aesthetic concerns such as taste or appearance, not health violations. Federal contaminant testing is shown in the sections above.
Hard water detected in RIVERSIDE PUBLIC UTILITIES
Your utility reported water hardness of 189 ppm CaCO₃ (11 grains per gallon) in its most recent Consumer Confidence Report. This is in the hard range and may cause scale buildup, reduced appliance lifespan, and dry skin or hair.
There are three common approaches to treating hard water: salt-based ion-exchange softeners (most effective, require salt refills), salt-free conditioners (lower maintenance, scale prevention only), and reverse osmosis at the kitchen sink (cooking and drinking water only). Aquasana, EcoWater, Pelican, and SpringWell are among the major US brands.
Paid Partner. ZipCheckup earns commission on Aquasana purchases. We do not test water or verify product effectiveness for specific hardness levels — manufacturer claims are theirs alone. Consult a certified water-quality professional for personalized advice.
Hardness data parsed from this utility's most recent Consumer Confidence Report. Severity bands per USGS hard water classification.