Drinking water quality · 2024

What's in Moreno Valley, CA tap water

30 contaminants were measured in the Moreno Valley, CA water system's 2024 annual report. Each is shown below against its federal limit — 3 sit at or above that limit.

Browse the mapFull source report ↗

Reporting year: 2024
Contaminants measured: 30
Over federal limit: 3
Approaching the limit: 1
Worst contaminant: Turbidity
Service area: CA
Source: Utility CCR

At or above the federal limit

Approaching the limit (≥ 80%)

TTHM
Disinfection byproducts
2.7–70 ug/L
88% of the limit

Where your water comes from · EPA SDWIS

Moreno Valley, CA's drinking water comes from ground water, drawn from 2 sources.

Source

2ground water

WELL 01 - MARJORIE
WELL 02 - HANNING

Treatment

0treatment plants

Distribution

0storage units

Source: EPA SDWIS facilities inventory. Methodology.

Compliance history

Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.

Maximum contaminant level exceededHealth-based
10 violations on record · most recent Jan 2017
resolved

Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗

Physical & aggregate

Contaminant	Measured	Federal limit	Status
TurbidityA measure of cloudiness from suspended particles in the water.	97 NTUAveragePerris Filtration Plant	None set	At or above the limit
+By source (11)— Perris Filtration Plant, East Valley, EMWD's Entire Distribution System +8 more Perris Filtration PlantPlant avgNot detected NTUrange0.74 NTU9700% of limit East ValleyPlant 100% of limit EMWD's Entire Distribution SystemZone 40% of limit North Perris WellsPlant avgNot detected NTUrange0–0.3 NTU30% of limit North PerrisPlant 30% of limit East Valley WellsPlant avgNot detected NTUrange0–0.26 NTU26% of limit Hemet Filtration PlantPlant avgNot detected NTUrange0.15 NTU15% of limit Mills Filtration PlantPlant avgNot detected NTUrange0.08 NTU8% of limit Skinner Filtration PlantPlant avgNot detected NTUrange0.07 NTU7% of limit Perris Valley Wells MPlant avgNot detected NTU0% of limit Desalination Complex LPlant avgNot detected NTU0% of limit
ColorA measure of visible tint in the water.	2AverageMills Filtration Plant	None set	Detected — no federal limit
+By source (10)— EMWD's Entire Distribution System, East Valley, Hemet Filtration Plant +7 more EMWD's Entire Distribution SystemZone East ValleyPlant Hemet Filtration PlantPlant avg1.9range0–2.5 Mills Filtration PlantPlant avg2range1–2 Skinner Filtration PlantPlant avg2range1–2 Desalination Complex LPlant avgNot detected North Perris WellsPlant avgNot detected Perris Filtration PlantPlant avgNot detected Perris Valley Wells MPlant avgNot detected East Valley WellsPlant avgNot detected
OdorA measure of detectable smell in the water.	1–2Reported levelEMWD's Entire Distribution System	None set	Detected — no federal limit
+By source (3)— EMWD's Entire Distribution System, North Perris, East Valley EMWD's Entire Distribution SystemZone North PerrisPlant East ValleyPlant
pHA measure of how acidic or basic the water is.	6.3–8.9Reported levelEMWD's Entire Distribution System	None set	Detected — no federal limit
+By source (2)— EMWD's Entire Distribution System, East Valley EMWD's Entire Distribution SystemZone East ValleyPlant
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.	1120 uS/cmAveragePerris Valley Wells M	None set	Detected — no federal limit
+By source (8)— Perris Filtration Plant, Perris Valley Wells M, East Valley Wells +5 more Perris Filtration PlantPlant avg502 uS/cmrange346–1210 uS/cm Perris Valley Wells MPlant avg1120 uS/cm East Valley WellsPlant avg509 uS/cmrange316–938 uS/cm Skinner Filtration PlantPlant avg910 uS/cmrange903–917 uS/cm North Perris WellsPlant avg612 uS/cmrange591–643 uS/cm Desalination Complex LPlant avg518 uS/cmrange307–629 uS/cm Hemet Filtration PlantPlant avg396 uS/cmrange280–527 uS/cm Mills Filtration PlantPlant avg392 uS/cmrange317–466 uS/cm
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.	826 mg/LAveragePerris Valley Wells M	None set	Detected — no federal 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/L Perris Filtration PlantPlant avg289 mg/Lrange199–715 mg/L East Valley WellsPlant avg313 mg/Lrange196–582 mg/L Skinner Filtration PlantPlant avg566 mg/Lrange560–572 mg/L Desalination Complex LPlant avg332 mg/Lrange259–462 mg/L North Perris WellsPlant avg396 mg/Lrange381–412 mg/L Hemet Filtration PlantPlant avg228 mg/Lrange157–305 mg/L Mills Filtration PlantPlant avg220 mg/Lrange178–263 mg/L

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
TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.	2.7–70 ug/LReported levelEMWD's Entire Distribution System	None set	Approaching the limit
+By source (4)— EMWD's Entire Distribution System, City of Perris, East Valley +1 more EMWD's Entire Distribution SystemZone 88% of limit City of PerrisZone 84% of limit East ValleyPlant 81% of limit North PerrisPlant 13% of limit
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.	0–28 ug/LReported levelEMWD's Entire Distribution System	None set	Within the limit
+By source (4)— EMWD's Entire Distribution System, East Valley, City of Perris +1 more EMWD's Entire Distribution SystemZone 47% of limit East ValleyPlant 47% of limit City of PerrisZone 40% of limit North PerrisPlant 4% of limit
PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection.	2.3 ug/LAveragePerris Valley Wells M	None set	Detected — no federal limit
+By source (8)— Perris Valley Wells M, Desalination Complex L, Mills Filtration Plant +5 more Perris Valley Wells MPlant avg2.3 ug/L Desalination Complex LPlant avgNot detected ug/L Mills Filtration PlantPlant avgNot detected ug/L North Perris WellsPlant avgNot detected ug/L Perris Filtration PlantPlant avgNot detected ug/L Skinner Filtration PlantPlant avgNot detected ug/L East Valley WellsPlant avgNot detected ug/L Hemet Filtration PlantPlant avgNot detected ug/L

Other

Contaminant	Measured	Federal limit	Status
Chlorine Total	0–4.3 mg/LReported levelEMWD's Entire Distribution System	4 mg/LMCL	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 ValleyPlant 102% of limit City of PerrisZone 85% of limit North PerrisPlant 28% 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 Perris Filtration PlantPlant avgNot detected pCi/L0% of limit Mills 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, Perris Valley Wells M +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 Perris Valley Wells MPlant 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 Hemet Filtration PlantPlant avgNot detected pCi/L0% of limit Desalination Complex LPlant avgNot detected pCi/L0% of limit
Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances.	18.6 pCi/LAverageHemet Filtration Plant	None set	Detected — no federal limit
+By source (7)— East Valley Wells, Hemet Filtration Plant, Desalination Complex L +4 more East Valley WellsPlant avg8.5 pCi/Lrange0–20 pCi/L Hemet Filtration PlantPlant avg18.6 pCi/L Desalination Complex LPlant avg14 pCi/Lrange13–16 pCi/L Perris Filtration PlantPlant avg12.9 pCi/L Perris Valley Wells MPlant avg9.6 pCi/L Skinner Filtration PlantPlant avg4 pCi/Lrange0–5 pCi/L Mills Filtration PlantPlant avgNot detected pCi/L
UraniumA naturally occurring radioactive metal from erosion of natural deposits.	2.4 pCi/LAverageEast Valley Wells	20 pCi/LMCL	Detected — no federal limit
+By source (8)— East Valley Wells, Skinner Filtration Plant, North Perris Wells +5 more East Valley WellsPlant avg2.4 pCi/Lrange0–6.6 pCi/L Skinner Filtration PlantPlant avg2 pCi/Lrange0–3 pCi/L North Perris WellsPlant avg1.4 pCi/Lrange1–2 pCi/L Perris Valley Wells MPlant avg1.8 pCi/L Desalination Complex LPlant avgNot detected pCi/L Mills Filtration PlantPlant avgNot detected pCi/L Perris Filtration PlantPlant avgNot detected pCi/L Hemet Filtration PlantPlant avgNot detected pCi/L

Metals

Contaminant	Measured	Federal limit	Status
ArsenicA naturally occurring element that also enters water from industry and agriculture.	2.5 ug/LAveragePerris Valley Wells M	None set	Within the limit
+By source (8)— East Valley Wells, Perris Valley Wells M, Hemet Filtration Plant +5 more East Valley WellsPlant avg2.3 ug/Lrange0–5.6 ug/L56% of limit Perris Valley Wells MPlant avg2.5 ug/L25% of limit Hemet Filtration PlantPlant avg2.3 ug/L23% of limit Desalination Complex LPlant avgNot detected ug/L0% of limit Mills Filtration PlantPlant avgNot detected ug/L0% of limit North Perris WellsPlant avgNot detected ug/L0% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit Skinner Filtration PlantPlant avgNot detected ug/L0% of limit
BariumA metal from erosion of natural deposits and industrial discharge.	209 ug/LAveragePerris Valley Wells M	None set	Within the limit
+By source (8)— Perris Valley Wells M, East Valley Wells, North Perris Wells +5 more Perris Valley Wells MPlant avg209 ug/L10% of limit East Valley WellsPlant avg114 ug/Lrange0–187 ug/L9% of limit North Perris WellsPlant avg130 ug/Lrange120–140 ug/L7% of limit Skinner Filtration PlantPlant avg116 ug/L6% of limit Desalination Complex LPlant avgNot detected ug/L0% of limit Mills Filtration PlantPlant avgNot detected ug/L0% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit Hemet Filtration PlantPlant avgNot detected ug/L0% of limit
CopperA metal that enters water from corroding household plumbing.	90 ug/LReported levelMills	None set	Within the limit
SeleniumA trace element from natural deposits and industrial discharge.	Not detected ug/LAverageSkinner Filtration Plant	None set	Within the limit
+By source (8)— East Valley Wells, Skinner Filtration Plant, Hemet Filtration Plant +5 more East Valley WellsPlant avgNot detected ug/Lrange0–12 ug/L24% of limit Skinner Filtration PlantPlant avgNot detected ug/L0% of limit Hemet 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 Mills Filtration PlantPlant avgNot detected ug/L0% of limit North Perris WellsPlant avgNot detected ug/L0% of limit Perris Filtration PlantPlant avgNot detected ug/L0% of limit
AluminumA common element sometimes used as a treatment coagulant.	74 ug/LAverageSkinner Filtration Plant	None set	Detected — no federal limit
+By source (8)— Skinner Filtration Plant, Mills Filtration Plant, North Perris Wells +5 more Skinner Filtration PlantPlant avg74 ug/Lrange0–160 ug/L Mills Filtration PlantPlant avgNot detected ug/Lrange0–110 ug/L North Perris WellsPlant avgNot detected ug/L Perris Filtration PlantPlant avgNot detected ug/L Perris Valley Wells MPlant avgNot detected ug/L Desalination Complex LPlant avgNot detected ug/L East Valley WellsPlant avgNot detected ug/L Hemet Filtration PlantPlant avgNot detected ug/L
Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium.	1.2 ug/LAveragePerris Valley Wells M	None set	Detected — no federal limit
+By source (8)— Perris Valley Wells M, North Perris Wells, Desalination Complex L +5 more Perris Valley Wells MPlant avg1.2 ug/L North Perris WellsPlant avgNot detected ug/Lrange0–0.2 ug/L Desalination Complex LPlant avgNot detected ug/L Mills Filtration PlantPlant avgNot detected ug/L Perris Filtration PlantPlant avgNot detected ug/L Skinner Filtration PlantPlant avgNot detected ug/L East Valley WellsPlant avgNot detected ug/L Hemet Filtration PlantPlant avgNot detected ug/L
IronA naturally occurring metal common in groundwater.	Not detected ug/LAverageDesalination Complex L	None set	Detected — no federal limit
+By source (8)— Desalination Complex L, East Valley Wells, Mills Filtration Plant +5 more Desalination Complex LPlant avgNot detected ug/Lrange0–668 ug/L East Valley WellsPlant avgNot detected ug/Lrange0–213 ug/L Mills Filtration PlantPlant avgNot detected ug/L North Perris WellsPlant avgNot detected ug/L Perris Filtration PlantPlant avgNot detected ug/L Perris Valley Wells MPlant avgNot detected ug/L Skinner Filtration PlantPlant avgNot detected ug/L Hemet Filtration PlantPlant avgNot detected ug/L
ManganeseA naturally occurring metal from soil and rock.	Not detected ug/LAverageDesalination Complex L	None set	Detected — no federal limit
+By source (8)— Desalination Complex L, Mills Filtration Plant, North Perris Wells +5 more Desalination Complex LPlant avgNot detected ug/Lrange0–24 ug/L Mills Filtration PlantPlant avgNot detected ug/L North Perris WellsPlant avgNot detected ug/L Perris Filtration PlantPlant avgNot detected ug/L Perris Valley Wells MPlant avgNot detected ug/L Skinner Filtration PlantPlant avgNot detected ug/L East Valley WellsPlant avgNot detected ug/L Hemet Filtration PlantPlant avgNot detected ug/L

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
FluorideA mineral often added to drinking water to help prevent tooth decay.	0.7 mg/LAverageMills Filtration Plant	4 mg/LMCL	Within the limit
+By source (8)— Mills Filtration Plant, Skinner Filtration Plant, North Perris Wells +5 more Mills Filtration PlantPlant avg0.7 mg/Lrange0.6–0.9 mg/L23% of limit Skinner Filtration PlantPlant avg0.7 mg/Lrange0.6–0.8 mg/L20% of limit North Perris WellsPlant avg0.5 mg/Lrange0.4–0.6 mg/L15% of limit Perris Valley Wells MPlant avg0.4 mg/L10% of limit Perris Filtration PlantPlant avgNot detected mg/Lrange0–0.3 mg/L8% of limit East Valley WellsPlant avg0.2 mg/Lrange0.1–0.3 mg/L8% of limit Hemet Filtration PlantPlant avgNot detected mg/Lrange0–0.1 mg/L3% of limit Desalination Complex LPlant avgNot detected mg/L0% of limit
NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits.	1.7 mg/LAverageDesalination Complex L	10 mg/LMCL	Within the limit
+By source (8)— Perris Valley Wells M, East Valley Wells, Desalination Complex L +5 more Perris Valley Wells MPlant avg0.6 mg/Lrange5.7–6.5 mg/L65% of limit East Valley WellsPlant avg0.75 mg/Lrange0–3.4 mg/L34% of limit Desalination Complex LPlant avg1.7 mg/Lrange0–2.1 mg/L21% of limit Hemet Filtration PlantPlant avgNot detected mg/Lrange0–1.6 mg/L16% of limit Perris Filtration PlantPlant avgNot detected mg/Lrange0–1.1 mg/L11% of limit North Perris WellsPlant avg0.43 mg/Lrange0–0.87 mg/L9% of limit Mills Filtration PlantPlant avg0.8 mg/L8% of limit Skinner Filtration PlantPlant avgNot detected mg/L0% of limit
NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits.	Not detected mg/LAverageDesalination Complex L	1 mg/LMCL	Within the limit
+By source (8)— Perris Filtration Plant, Hemet Filtration Plant, Desalination Complex L +5 more Perris Filtration PlantPlant avgNot detected mg/Lrange0–0.83 mg/L83% of limit Hemet Filtration PlantPlant avgNot detected mg/Lrange0–0.8 mg/L80% of limit Desalination Complex LPlant avgNot detected mg/Lrange0–0.53 mg/L53% of limit Mills Filtration PlantPlant avgNot detected mg/L0% of limit North Perris WellsPlant avgNot detected mg/L0% of limit Perris Valley Wells MPlant avgNot detected mg/L0% of limit Skinner Filtration PlantPlant avgNot detected mg/L0% of limit East Valley WellsPlant avgNot detected mg/L0% of limit
ChlorideA naturally occurring salt compound.	233 mg/LAveragePerris Valley Wells M	None set	Detected — no federal limit
+By source (8)— Perris Valley Wells M, Desalination Complex L, Perris Filtration Plant +5 more Perris Valley Wells MPlant avg233 mg/L Desalination Complex LPlant avg115 mg/Lrange95–145 mg/L Perris Filtration PlantPlant avg71 mg/Lrange48–120 mg/L East Valley WellsPlant avg33 mg/Lrange9.8–105 mg/L Skinner Filtration PlantPlant avg96 mg/Lrange92–100 mg/L North Perris WellsPlant avg91 mg/Lrange86–97 mg/L Hemet Filtration PlantPlant avg58 mg/Lrange38–84 mg/L Mills Filtration PlantPlant avg54 mg/Lrange41–67 mg/L
SulfateA naturally occurring mineral from rock and soil.	199 mg/LAverageSkinner Filtration Plant	None set	Detected — no federal limit
+By source (8)— Perris Filtration Plant, Skinner Filtration Plant, East Valley Wells +5 more Perris Filtration PlantPlant avg46 mg/Lrange19–224 mg/L Skinner Filtration PlantPlant avg199 mg/Lrange195–203 mg/L East Valley WellsPlant avg56 mg/Lrange9.7–177 mg/L Perris Valley Wells MPlant avg53 mg/L Mills Filtration PlantPlant avg34 mg/Lrange21–47 mg/L Hemet Filtration PlantPlant avg30 mg/Lrange15–46 mg/L North Perris WellsPlant avg28 mg/Lrange22–34 mg/L Desalination Complex LPlant avg21 mg/Lrange15–29 mg/L

Microbial

Contaminant	Measured	Federal limit	Status
Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals.	0Reported levelEMWD's Entire Distribution System	0MCLG	None detected
+By source (4)— EMWD's Entire Distribution System, East Valley, North Perris +1 more EMWD's Entire Distribution SystemZone East ValleyPlant North PerrisPlant City of 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 ValleyPlant North PerrisPlant City of PerrisZone

Source: Moreno Valley, 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.