Drinking water quality · 2026
· Verified
What's in Western MWD - Murrieta Division, CA tap water
33 contaminants were measured in the Western MWD - Murrieta Division, CA water system's 2026 annual report. Each is shown below against its federal limit.
- Reporting year
- 2026
- Contaminants measured
- 33
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
PFAS — EPA UCMR5 (2023–2025)
2 PFAS compounds above EPA limits in Western MWD - Murrieta Division, CA
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.
PFOS (Perfluorooctane sulfonic acid)
● Over EPA limit (1.4×)below national p90 (19.900000000000006 ng/L across detecting U.S. systems)
PFOA (Perfluorooctanoic acid)
● Over EPA limit (1.4×)below national p90 (13.649999999999999 ng/L across detecting U.S. systems)
PFHxS (Perfluorohexane sulfonic acid)
● Below limitbelow national p90 (12.049999999999997 ng/L across detecting U.S. systems)
Lithium
● Detected (no federal limit)below national p90 (76.59999999999991 mg/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Western MWD - Murrieta Division, CA's drinking water comes from ground water, drawn from 2 sources.
Source
- NEW CLAY WELL
- NORTH
Treatment
- NORTH WELL 2 - WATER TREATMENT PLANT
- NEW CLAY WELL - TREATED XCLD
Distribution
Also buys water from EASTERN MUNICIPAL WD, ELSINORE VALLEY MWD.
Historical readings · EPA Six-Year Review (2012–2019)
1 contaminant historically over EPA limits in Western MWD - Murrieta Division, CA
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) |
|---|---|---|---|
ARSENIC worst: 2013 | 0.028 mg/L 2.8× 2.1× the national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2016 | 0.028 mg/L within | 0.06 mg/L | '12'14'15'16'17'18'19 |
TTHM worst: 2018 | 0.031 mg/L within | 0.08 mg/L | '12'14'15'16'17'18'19 |
FLUORIDE worst: 2015 | 0.9 mg/L within | 4 mg/L | '12'14'15'18 |
BARIUM worst: 2015 | 0.31 mg/L within above national p90 | 2 mg/L | '12'15'18 |
SELENIUM worst: 2015 | 0.0062 mg/L within | 0.05 mg/L | '15 |
NITRATE worst: 2014 | 0.362 mg/L within | 10 mg/L | '12'13'14'15'16 |
URANIUM worst: 2015 | 0.00243 ug/L within below national p90 | 30 ug/L | '14'15 |
COPPER worst: 2016 | 0.7 mg/L near national p90 | — | '16 |
DBAA worst: 2012 | 0.0026 mg/L | — | '12'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0017 mg/L | — | '12'14'15'16'17'18'19 |
MBAA worst: 2012 | 0.0016 mg/L | — | '12'14'15'19 |
MCAA worst: 2012 | 0.0052 mg/L | — | '12'14'15'16'17'19 |
TCAA worst: 2012 | 0.0013 mg/L | — | '12'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0047 mg/L | — | '12'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.004 mg/L | — | '12'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0026 mg/L | — | '12'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0067 mg/L | — | '12'14'15'16'17'18'19 |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1000 UMHO/CMAverageEntry point | 1600 UMHO/CMMCL | Within the limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 590 MG/LAverageEntry point | 1000 MG/LMCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.06833333333333334 NTUAverageDistribution | 5 NTUMCL | Within the limit |
| ColorA measure of visible tint in the water. | Not detected UNITSHighest single sampleDistribution | 15 UNITSMCL | None detected |
| OdorA measure of detectable smell in the water. | Not detected TONHighest single sampleEntry point | 3 TONMCL | None detected |
| AlkalinityA measure of the water's capacity to neutralize acids. | 134.16666666666666 MG/LAverageEntry point | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 280 MG/LAverageEntry point | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 8.25 PHAverageSource water | None set | Detected — no federal limit |
Inorganic chemicals
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ManganeseA naturally occurring metal from soil and rock. | 13.5 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| IronA naturally occurring metal common in groundwater. | Not detected UG/LHighest single sampleEntry point | 300 UG/LMCL | None detected |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | Not detected UG/LHighest single sampleEntry point | 5000 UG/LMCL | None detected |
| CalciumA naturally occurring mineral that contributes to water hardness. | 41.75 MG/LAverageEntry point | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 20 MG/LAverageEntry point | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 2 MG/LAverageEntry point | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 110 MG/LAverageEntry point | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | Not detected UG/LHighest single sampleSource water | 0.005 UG/LMCL | None detected |
People also ask about Western MWD - Murrieta Division, CA's water
+Is Western MWD - Murrieta Division, CA tap water safe to drink in 2026?
Every one of the 33 contaminants measured in Western MWD - Murrieta Division, CA's 2026 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Western MWD - Murrieta Division, CA tap water?
33 contaminants were measured in Western MWD - Murrieta Division, CA's 2026 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 17 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Western MWD - Murrieta Division, CA's 2026 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Western MWD - Murrieta Division, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2026 report; a new report will replace it once the utility publishes its next annual update.