Drinking water quality · 2024

· Verified May 23, 2026

What's in City of Perris, CA tap water

31 contaminants were measured in the City of Perris, CA water system's 2024 annual report. Each is shown below against its federal limit — 5 sit at or above that limit.

See it on the mapFull source report ↗

Reporting year: 2024
Contaminants measured: 31
Over federal limit: 5
Approaching the limit: 1
Worst contaminant: Bromate
Service area: CA
Source: Utility CCR

At or above the federal limit

Approaching the limit (≥ 80%)

Total Dissolved Solids
Physical & aggregate
826 mg/L
83% of the limit

PFAS — EPA UCMR5 (2023–2025)

1 PFAS compound detected in City of Perris, CA

About this data

The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.

Lithium

● Detected (no federal limit)

Measured 39 mg/LSample year 2024Samples 5 detect / 18

near national p90 (76.59999999999991 mg/L across detecting U.S. systems)

Source:EPA UCMR5· 2024 · 18 samples · 5 detected↗

PWSID CA3310009 · Source: EPA UCMR5. Limits per EPA's April 2024 PFAS National Primary Drinking Water Regulation. PFAS values reported in nanograms per liter (ng/L) — note that 1 ng/L = 1 part per trillion.

Where your water comes from · EPA SDWIS

City of Perris, CA's drinking water comes from ground water, drawn from 32 sources.

Source

32ground water

WELL · 9
WELL 84
WELL 17 - CIENEGA
WELL 88
+ 20 more

Treatment

14treatment plants

WELL 38 - CL
WELL 90 - EVANS & OLD MTN - TREATED - CL
WELL 91 - RAMONA & ESPLND - TREATED - CL
+ 11 more

Distribution

0storage units

Also buys water from METROPOLITAN WATER DIST. OF SO. CAL., ELSINORE VALLEY MWD, and 3 more.

Source: EPA SDWIS facilities inventory. Methodology.

Historical readings · EPA Six-Year Review (2012–2019)

6 contaminants historically over EPA limits in City of Perris, CA

About this data

Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.

Contaminant	Worst detection	EPA limit	Years (2012–2019)
GROSS BETA worst: 2017	13.3 mrem/yr 3.3×	4 mrem/yr	'13'14'15'16'17'18'19
TTHM worst: 2016	0.12 mg/L 1.5×	0.08 mg/L	'12'13'14'15'16'17'18'19
ARSENIC worst: 2016	0.013 mg/L 1.3× near national p90	0.01 mg/L	'12'13'14'15'16'17'18'19
NITRATE worst: 2019	13 mg/L 1.3×	10 mg/L	'12'13'14'15'16'17'18'19
NITRATE NITRITE worst: 2016	12 mg/L 1.2×	10 mg/L	'16'17
HAA5 worst: 2017	0.07 mg/L 1.2×	0.06 mg/L	'12'13'14'15'16'17'18'19
BARIUM worst: 2012	1.45 mg/L within 6.6× the national p90	2 mg/L	'12'13'14'15'16'17'18'19
PCE worst: 2014	0.0025 mg/L within	0.005 mg/L	'14'17
FLUORIDE worst: 2017	1.3 mg/L within	4 mg/L	'12'13'14'15'16'17'18'19
TCE worst: 2012	0.0013 mg/L within	0.005 mg/L	'12'13'14'15'16'17'19
SELENIUM worst: 2013	0.012 mg/L within	0.05 mg/L	'12'13'14'15'16'17'18'19
CADMIUM worst: 2018	0.00039 mg/L within below national p90	0.005 mg/L	'18
CYANIDE worst: 2017	0.0101 mg/L within below national p90	0.2 mg/L	'17
URANIUM worst: 2014	0.0285 ug/L within above national p90	30 ug/L	'12'13'14'15'16'17'18'19
NITRITE worst: 2016	0.0005 mg/L within	1 mg/L	'16'18'19
MBAA worst: 2012	0.003 mg/L	—	'12'13'14'15'16'17'18'19
COPPER worst: 2016	0.15 mg/L below national p90	—	'16'18
MCAA worst: 2012	0.016 mg/L	—	'12'13'14'15'16'17'19
LEAD worst: 2012	0.015 mg/L	—	'12'18
DBAA worst: 2012	0.011 mg/L	—	'12'13'14'15'16'17'18'19
DCAA worst: 2012	0.02 mg/L	—	'12'13'14'15'16'17'18'19
TCAA worst: 2012	0.0048 mg/L	—	'12'13'14'15'16'17'18'19
BROMODICHLOROMETHANE worst: 2012	0.018 mg/L	—	'12'13'14'15'16'17'18'19
BROMOFORM worst: 2012	0.059 mg/L	—	'12'13'14'15'16'17'18'19
CHLOROFORM worst: 2012	0.014 mg/L	—	'12'13'14'15'16'17'18'19
DIBROMOCHLOROMETHANE worst: 2012	0.025 mg/L	—	'12'13'14'15'16'17'18'19

PWSID CA3310009 · Source: EPA Six-Year Review 4 (2012–2019). Values are the highest detection in each calendar year; non-detect years are omitted. Year tags above show every year with a detection.

Disinfection byproducts

Contaminant	Measured	Federal limit	Status
BromateA disinfection byproduct formed when bromide-containing water is treated with ozone.	0–19 ug/LReported levelMills	0.1 ug/LPublic health goal	At or above the limit
PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection.	2.3 ug/LAveragePerris Valley Wells M	6 ug/LMCL	Within the limit
+By source (8)— Perris Valley Wells M, Skinner Filtration Plant, Desalination Complex L +5 more Perris Valley Wells MPlant avg2.3 ug/L38% of limit Skinner Filtration PlantPlant avgNot detected ug/L0% of limit Desalination Complex LPlant avgNot detected ug/L0% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit East Valley WellsPlant avgNot detected ug/L0% of limit Hemet Filtration PlantPlant avgNot detected ug/L0% of limit North Perris WellsPlant avgNot detected ug/L0% of limit Mills Filtration PlantPlant avgNot detected ug/L0% of limit

Physical & aggregate

Contaminant	Measured	Federal limit	Status
pHA measure of how acidic or basic the water is.	6.3–8.1Reported levelMills	6.5MCL	At or above the limit
+By source (2)— EMWD's Entire Distribution System, East Valley EMWD's Entire Distribution SystemZone 123% of limit East ValleyZone 122% of limit
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.	826 mg/LAveragePerris Valley Wells M	1000 mg/LMCL	Approaching the limit
+By source (8)— Perris Valley Wells M, Perris Filtration Plant, East Valley Wells +5 more Perris Valley Wells MPlant avg826 mg/Lrange800–852 mg/L85% of limit Perris Filtration PlantPlant avg289 mg/Lrange199–715 mg/L72% of limit East Valley WellsPlant avg313 mg/Lrange196–582 mg/L58% of limit Skinner Filtration PlantPlant avg566 mg/Lrange560–572 mg/L57% of limit Desalination Complex LPlant avg332 mg/Lrange259–462 mg/L46% of limit North Perris WellsPlant avg396 mg/Lrange381–412 mg/L41% of limit Hemet Filtration PlantPlant avg228 mg/Lrange157–305 mg/L31% of limit Mills Filtration PlantPlant avg220 mg/Lrange178–263 mg/L26% of limit
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.	1120 uS/cmAveragePerris Valley Wells M	1600 uS/cmMCL	Within the limit
+By source (8)— Perris Filtration Plant, Perris Valley Wells M, East Valley Wells +5 more Perris Filtration PlantPlant avg502 uS/cmrange346–1210 uS/cm76% of limit Perris Valley Wells MPlant avg1120 uS/cm70% of limit East Valley WellsPlant avg509 uS/cmrange316–938 uS/cm59% of limit Skinner Filtration PlantPlant avg910 uS/cmrange903–917 uS/cm57% of limit North Perris WellsPlant avg612 uS/cmrange591–643 uS/cm40% of limit Desalination Complex LPlant avg518 uS/cmrange307–629 uS/cm39% of limit Hemet Filtration PlantPlant avg396 uS/cmrange280–527 uS/cm33% of limit Mills Filtration PlantPlant avg392 uS/cmrange317–466 uS/cm29% of limit
OdorA measure of detectable smell in the water.	1Reported levelSkinner	3MCL	Within the limit
+By source (3)— EMWD's Entire Distribution System, East Valley, North Perris EMWD's Entire Distribution SystemZone 33% of limit East ValleyZone 33% of limit North PerrisZone 33% of limit
ColorA measure of visible tint in the water.	2AverageSkinner Filtration Plant	15MCL	Within the limit
+By source (10)— East Valley, EMWD's Entire Distribution System, Hemet Filtration Plant +7 more East ValleyZone 100% of limit EMWD's Entire Distribution SystemZone 100% of limit Hemet Filtration PlantPlant avg1.9range0–2.517% of limit Skinner Filtration PlantPlant avg2range1–213% of limit Mills Filtration PlantPlant avg2range1–213% of limit Perris Filtration PlantPlant avgNot detected0% of limit East Valley WellsPlant avgNot detected0% of limit Perris Valley Wells MPlant avgNot detected0% of limit Desalination Complex LPlant avgNot detected0% of limit North Perris WellsPlant avgNot detected0% of limit
TurbidityA measure of cloudiness from suspended particles in the water.	Not detected NTUAverageHemet Filtration Plant	5 NTUMCL	Within the limit
+By source (11)— East Valley, EMWD's Entire Distribution System, North Perris Wells +8 more East ValleyZone 20% of limit EMWD's Entire Distribution SystemZone 8% of limit North Perris WellsPlant avgNot detected NTUrange0–0.3 NTU6% of limit North PerrisZone 6% of limit East Valley WellsPlant avgNot detected NTUrange0–0.26 NTU5% of limit Desalination Complex LPlant avgNot detected NTU0% of limit Perris Valley Wells MPlant avgNot detected NTU0% of limit Perris Filtration PlantPlant avgNot detected NTUrange0.74 NTU Hemet Filtration PlantPlant avgNot detected NTUrange0.15 NTU Mills Filtration PlantPlant avgNot detected NTUrange0.08 NTU Skinner Filtration PlantPlant avgNot detected NTUrange0.07 NTU

Disinfectants

Contaminant	Measured	Federal limit	Status
ChlorineA disinfectant added to drinking water to kill bacteria and viruses.	0–4.3 mg/LReported levelMills	4 mg/LMRDL	At or above the limit
+By source (4)— EMWD's Entire Distribution System, East Valley, City of Perris +1 more EMWD's Entire Distribution SystemZone 108% of limit East ValleyZone 102% of limit City of PerrisZone 43% of limit North PerrisZone 20% of limit

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
ChlorideA naturally occurring salt compound.	233 mg/LAveragePerris Valley Wells M	500 mg/LMCL	Within the limit
+By source (8)— Perris Valley Wells M, Desalination Complex L, Perris Filtration Plant +5 more Perris Valley Wells MPlant avg233 mg/L47% of limit Desalination Complex LPlant avg115 mg/Lrange95–145 mg/L29% of limit Perris Filtration PlantPlant avg71 mg/Lrange48–120 mg/L24% of limit East Valley WellsPlant avg33 mg/Lrange9.8–105 mg/L21% of limit Skinner Filtration PlantPlant avg96 mg/Lrange92–100 mg/L20% of limit North Perris WellsPlant avg91 mg/Lrange86–97 mg/L19% of limit Hemet Filtration PlantPlant avg58 mg/Lrange38–84 mg/L17% of limit Mills Filtration PlantPlant avg54 mg/Lrange41–67 mg/L13% of limit
SulfateA naturally occurring mineral from rock and soil.	199 mg/LAverageSkinner Filtration Plant	500 mg/LMCL	Within the limit
+By source (8)— Perris Filtration Plant, Skinner Filtration Plant, East Valley Wells +5 more Perris Filtration PlantPlant avg46 mg/Lrange19–224 mg/L45% of limit Skinner Filtration PlantPlant avg199 mg/Lrange195–203 mg/L41% of limit East Valley WellsPlant avg56 mg/Lrange9.7–177 mg/L35% of limit Perris Valley Wells MPlant avg53 mg/L11% of limit Mills Filtration PlantPlant avg34 mg/Lrange21–47 mg/L9% of limit Hemet Filtration PlantPlant avg30 mg/Lrange15–46 mg/L9% of limit North Perris WellsPlant avg28 mg/Lrange22–34 mg/L7% of limit Desalination Complex LPlant avg21 mg/Lrange15–29 mg/L6% of limit

Radionuclides

Contaminant	Measured	Federal limit	Status
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.	5.2 pCi/LAveragePerris Valley Wells M	15 pCi/LMCL	Within the limit
+By source (8)— East Valley Wells, Perris Valley Wells M, Desalination Complex L +5 more East Valley WellsPlant avg3.5 pCi/Lrange0–10.6 pCi/L71% of limit Perris Valley Wells MPlant avg5.2 pCi/L35% of limit Desalination Complex LPlant avg3.9 pCi/Lrange3.3–4.5 pCi/L30% of limit Skinner Filtration PlantPlant avgNot detected pCi/Lrange0–4 pCi/L27% of limit North Perris WellsPlant avgNot detected pCi/Lrange0–3.9 pCi/L26% of limit Mills Filtration PlantPlant avgNot detected pCi/L0% of limit Perris Filtration PlantPlant avgNot detected pCi/L0% of limit Hemet Filtration PlantPlant avgNot detected pCi/L0% of limit
Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements.	0.48 pCi/LAverageNorth Perris Wells	5 pCi/LMCL	Within the limit
+By source (8)— North Perris Wells, Mills Filtration Plant, Desalination Complex L +5 more North Perris WellsPlant avgNot detected pCi/Lrange0–1.2 pCi/L24% of limit Mills Filtration PlantPlant avgNot detected pCi/Lrange0–1 pCi/L20% of limit Desalination Complex LPlant avgNot detected pCi/L0% of limit Skinner Filtration PlantPlant avgNot detected pCi/L0% of limit Perris Filtration PlantPlant avgNot detected pCi/L0% of limit East Valley WellsPlant avgNot detected pCi/L0% of limit Perris Valley Wells MPlant avgNot detected pCi/L0% of limit Hemet Filtration PlantPlant avgNot detected pCi/L0% of limit

Metals

Contaminant	Measured	Federal limit	Status
Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium.	1.2 ug/LAveragePerris Valley Wells M	10 ug/LMCL	Within the limit
+By source (8)— Perris Valley Wells M, North Perris Wells, East Valley Wells +5 more Perris Valley Wells MPlant avg1.2 ug/L12% of limit North Perris WellsPlant avgNot detected ug/Lrange0–0.2 ug/L2% of limit East Valley WellsPlant avgNot detected ug/L0% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit Hemet Filtration PlantPlant avgNot detected ug/L0% of limit Mills Filtration PlantPlant avgNot detected ug/L0% of limit Skinner Filtration PlantPlant avgNot detected ug/L0% of limit Desalination Complex LPlant avgNot detected ug/L0% of limit
AluminumA common element sometimes used as a treatment coagulant.	74 ug/LAverageSkinner Filtration Plant	1000 ug/LMCL	Within the limit
+By source (8)— Skinner Filtration Plant, Mills Filtration Plant, Hemet Filtration Plant +5 more Skinner Filtration PlantPlant avg74 ug/Lrange0–160 ug/L16% of limit Mills Filtration PlantPlant avgNot detected ug/Lrange0–110 ug/L11% of limit Hemet Filtration PlantPlant avgNot detected ug/L0% of limit East Valley WellsPlant avgNot detected ug/L0% of limit North Perris WellsPlant avgNot detected ug/L0% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit Perris Valley Wells MPlant avgNot detected ug/L0% of limit Desalination Complex LPlant avgNot detected ug/L0% of limit
IronA naturally occurring metal common in groundwater.	Not detected ug/LAverageNorth Perris Wells	300 ug/LMCL	Within the limit
+By source (8)— Desalination Complex L, East Valley Wells, North Perris Wells +5 more Desalination Complex LPlant avgNot detected ug/Lrange0–668 ug/L223% of limit East Valley WellsPlant avgNot detected ug/Lrange0–213 ug/L71% of limit North Perris WellsPlant avgNot detected ug/L0% of limit Mills Filtration PlantPlant avgNot detected ug/L0% of limit Perris Valley Wells MPlant avgNot detected ug/L0% of limit Hemet Filtration PlantPlant avgNot detected ug/L0% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit Skinner Filtration PlantPlant avgNot detected ug/L0% of limit
ManganeseA naturally occurring metal from soil and rock.	Not detected ug/LAverageDesalination Complex L	50 ug/LMCL	Within the limit
+By source (8)— Desalination Complex L, Perris Filtration Plant, Hemet Filtration Plant +5 more Desalination Complex LPlant avgNot detected ug/Lrange0–24 ug/L48% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit Hemet Filtration PlantPlant avgNot detected ug/L0% of limit North Perris WellsPlant avgNot detected ug/L0% of limit Mills Filtration PlantPlant avgNot detected ug/L0% of limit Skinner Filtration PlantPlant avgNot detected ug/L0% of limit Perris Valley Wells MPlant avgNot detected ug/L0% of limit East Valley WellsPlant avgNot detected ug/L0% of limit

Microbial

Contaminant	Measured	Federal limit	Status
Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals.	0Reported levelCity of Perris	0MCLG	None detected
+By source (4)— City of Perris, EMWD's Entire Distribution System, East Valley +1 more City of PerrisZone EMWD's Entire Distribution SystemZone East ValleyZone North PerrisZone
Total ColiformA group of bacteria used as an indicator of overall water-system sanitation.	5Reported levelEMWD's Entire Distribution System	0MCLG	Detected — no federal limit
+By source (4)— EMWD's Entire Distribution System, East Valley, North Perris +1 more EMWD's Entire Distribution SystemZone East ValleyZone North PerrisZone City of PerrisZone

Source: City of Perris, CA's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.