PARAMOUNT - CITY, WATER DEPT.

PARAMOUNT, CA · ~55,200 people served

Check your exact address → PARAMOUNT overview

100

Excellent

PurityRadar safety score

PWSID

CA1910105

State

California

City

PARAMOUNT

Population served

55,200

Primary source

SWP

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

Latest detections from EPA’s UCMR5 monitoring (through Aug 2025). Levels in parts per trillion (ppt).

Lithium

17,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2020. Official EPA record →

Monitoring & reporting · EPA contaminant 0700 began May 2020 Resolved

Other · Total coliform began May 2008 Resolved

Recent enforcement actions

State action · SOX Jul 2020
State action · SFL Jul 2020
State action · SIA Oct 2008
State action · SOX Oct 2008
State action · SFL Jul 2004
State action · SFL Jan 1998
State action · SOX Jan 1998

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

Arsenic

7 stations · latest Mar 2022

9 · max 136 ug/l · 7

Fluoride

7 stations · latest Mar 2022

0.36 · max 0.47 mg/l · 7

Manganese

7 stations · latest Mar 2022

47.7 · max 134 ug/l · 7

Nitrate

2 stations · latest Mar 2022

0.282 · max 0.515 mg/l as N · 4

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 CA1910105 — 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.