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Water system · PWSID CA1210018

TRINIDAD, CITY OF

TRINIDAD, CA · ~1,072 people served

Check your exact address → TRINIDAD overview
100
Excellent
PurityRadar safety score

PWSID

CA1210018

State

California

City

TRINIDAD

Population served

1,072

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

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

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

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

12

Violations on record

0

Unaddressed

7

Health-based

21

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2024. Official EPA record →

Monitoring · Lead & Copper Rule began Apr 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2020 Resolved
Max residual disinfectant · EPA contaminant 0999 health-based began Oct 2019 Resolved
Monitoring · Lead & Copper Rule began Jun 2019 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2014 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2010 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2010 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2009 Resolved
Treatment technique · EPA contaminant 0200 health-based began Aug 2001 Resolved
Monitoring & reporting · EPA contaminant 0200 began Jan 1994 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jun 1993 Resolved

Recent enforcement actions

  • State action · SOX Dec 2024
  • State action · SFL Apr 2024
  • State action · SOX Dec 2022
  • State action · SFJ Feb 2021
  • State action · SOX Nov 2020
  • State action · SFJ Nov 2019
  • State action · SOX Jun 2019
  • State action · SFL Jun 2019

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

4 stations · latest Dec 2025

0.615 · max 6.6 mg/L · 36

Copper

2 stations · latest Nov 2024

5.2 · max 56 ug/L · 6

Arsenic

1 station · latest Oct 2021

1.3 · max 1.3 ug/L · 1

Lead

1 station · latest Nov 2024

18 · max 18 ug/L · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CA1210018 — 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.