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Water system · PWSID CA3610038

RIALTO, CITY OF

RIALTO, CA · ~54,453 people served

Check your exact address → RIALTO overview
71
Good
PurityRadar safety score

PWSID

CA3610038

State

California

City

RIALTO

Population served

54,453

Primary source

SWP

Score history

▼ 29 points — the score moved from 100 to 71 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 71

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Jan 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

7.3 ppt

limit 4 ppt

Above EPA limit · 1.8×

PFHxS

Perfluorohexanesulfonic acid

3.4 ppt

limit 10 ppt

Below EPA limit

PFPeA

18 ppt

limit —

No federal limit

PFHxA

17 ppt

limit —

No federal limit

PFBA

5.7 ppt

limit —

No federal limit

PFBS

3.9 ppt

limit —

No federal limit

PFHpA

3.5 ppt

limit —

No federal limit

Violations & enforcement

3

Violations on record

0

Unaddressed

2

Health-based

5

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2014. Official EPA record →

Monitoring & reporting · Nitrate began Jan 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 1993 Resolved

Recent enforcement actions

  • State action · SOX Mar 2014
  • State action · SFJ Feb 2014
  • State action · SOX Sep 1993
  • State action · SFJ Aug 1993
  • State action · SFJ Jul 1993

This profile is built from EPA public records for system CA3610038 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.