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Imperial, CA Tap Water Quality 2026

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

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

Main Utility: Imperial, City Of PWSID: CA1310006 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS was sampled but not enough times for a compliance determination.

B

Imperial earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: not detected
PFAS sampled, too few results to judge
12 violations since 2015, 8 health-based
No violations currently open
Imperial'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
13729
~6939 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
0
12 since 2015, all resolved

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
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.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Addressed
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Addressed
Consumer Confidence Rule OTHER — — 2024 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2018 Resolved
TTHM MCL EXCEEDANCE 0.095 MG/L 0.080 mg/L 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2017 Resolved
TTHM MCL EXCEEDANCE 0.097 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2017 Resolved
Public Notice OTHER — — 2016 Resolved
TTHM MCL EXCEEDANCE 0.093 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 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

12 violations are on record since 2015, of which 8 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Imperial, City Of
PWSID CA1310006
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 13,729
Service connections 6,939
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Imperial tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Imperial water have PFAS? ▼
It was sampled, but no sampling point had enough results for a compliance determination.
Who supplies water to Imperial? ▼
Imperial, City Of (PWSID CA1310006). Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2021-11-18. No significant deficiencies were recorded.

What Should Imperial 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
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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