Water Health Check Report

Perris, CA

Eastern Municipal Wd · Blended supply source

48

Concerning

1 above EPA limit
7 above EWG guideline
Perchlorate MCL updated 2026—compliance transition in progress

Score methodology →
EPA · CA3310009UCMR5 PFAS data included666,581 people servedLast updated Mar 2026
State monitoring · March 2026EPA SDWIS · December 2025EPA UCMR5 · October 2023

Concerning — with 8 concerns

Eastern Municipal Wd has 1 contaminant above EPA legal limits and 7 above EWG health guidelines. No PFAS detected in UCMR5 sampling

No PFAS detected in UCMR5 sampling

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Lead—source matters

Lead in tap water comes from household plumbing, not the source water or treatment plant. Perris water leaves the treatment plant lead-free. Risk depends on your building's internal plumbing—highest in homes built before 1986, when lead solder was common. A NSF/ANSI 53 certified pitcher or under-sink filter removes lead at point of use.

PFAS—25 compounds tested, none detected

EPA UCMR5 monitoring found no PFAS above the minimum reporting level in Perris's water supply. This is a meaningful result: PFAS have been detected in roughly half of all tested US public water systems.

Source: EPA UCMR5 (2023–2025) · 25 compounds tested including all regulated PFAS

Contaminants tested

39 total · 7 above EWG guideline
ContaminantLevelStatus
Perchlorate

CAS 14797-73-0

1.2 ppb
Above EPA limit
Arsenic

CAS 7440-38-2

2.2 ppb
Above guideline
34.8 ppb
Above guideline
8.3 ppb
Above guideline
Nitrate

CAS 14797-55-8

2.1 ppm
Above guideline
0.21 ppb
Above guideline
Manganese

CAS 7439-96-5

52.4 ppb
Above guideline
Lead

CAS 7439-92-1

2.8 ppb
Above guideline
Selenium

CAS 7782-49-2

1.0 ppb
Within limits
Barium

CAS 7440-39-3

0.18 ppm
Within limits
Fluoride

CAS 16984-48-8

0.06 ppm
Within limits
Lithium

CAS 7439-93-2

20.1 ppb
Within limits
Copper

CAS 7440-50-8

0.09 ppm
Within limits
Mercury (inorganic)

CAS 7439-97-6

ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
ND
Not detected
LegendWithin limitsAbove EWG guidelineAbove EPA limitNot detectedSource: EPA SDWIS · UCMR5 · EWG Health Guidelines

Filter recommendation

8 contaminants above guidelines. Here's what removes them.

A guided 4-question flow matches you to the right filter for your setup, budget, and household.

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Data sources

EPA UCMR5 (PFAS + lithium)·October 2023·One-time programme 2023–2025
State monitoring data·March 2026·Updated monthly
EPA SDWIS compliance data·December 2025·Annual reporting cycle

Status flags compare detected levels against both EPA legal limits and EWG health-based guidelines—which are stricter and science-derived, independent of political feasibility.

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