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Calimesa, CA Tap Water Quality 2026

Water quality report for Calimesa, CA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Calimesa's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Yucaipa Valley Water District PWSID: CA3610055 Updated: 2026 Q2
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1 violation currently open

Lead was not detected. PFAS was detected below the federal limit.

D

Calimesa earns a D for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: not detected
PFAS detected below the federal limit
9 violations since 2015, 5 health-based
1 violation currently open
Calimesa's lead level vs. all California community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of California utilities
Population Served
6025
~13646 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
1
1 open of 9 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
2,308% of EPA action level
30,000 ppb
Action level: 1,300 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2026 Unaddressed
TTHM MCL EXCEEDANCE 81.8 UG/L 0.080 mg/L 2024 Resolved
Nitrate MCL EXCEEDANCE 12 MG/L 10 mg/L 2023 Resolved
Public Notice OTHER — — 2021 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2021 Resolved
Public Notice OTHER — — 2019 Resolved
Nitrate MCL EXCEEDANCE 11 MG/L 10 mg/L 2019 Resolved
Nitrate MCL EXCEEDANCE 11 MG/L 10 mg/L 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

1 violation remains open, out of 9 recorded since 2015 (5 health-based).

About the Main Water System

Utility Yucaipa Valley Water District
PWSID CA3610055
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 6,025
Service connections 13,646
Systems serving this area 6
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Calimesa tap water safe to drink? ▼
No federal limit is exceeded on record. 1 violation(s) remain open.
Does Calimesa water have PFAS? ▼
PFAS was detected but stayed below the federal limit.
Who supplies water to Calimesa? ▼
Yucaipa Valley Water District (PWSID CA3610055), one of 6 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-03-24. No significant deficiencies were recorded.

What Should Calimesa Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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