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Tap water quality report

Western Mwd - Murrieta Division

EPA monitoring tested this supplier for 110 contaminants and detected 23. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
23
detected
17,453
people served
4
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
Riverside

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

4
health-based violations
14
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2006-01-01 → 2006-03-31
MCL Health-based Resolved 2006-01-01 → 2006-03-31
MCL Health-based Resolved 1994-03-01 → 1994-03-31
MCL Health-based Resolved 1994-03-01 → 1994-03-31
MR Monitoring Resolved 2005-10-01 → 2005-12-31
MR Monitoring Resolved 2005-10-01 → 2005-12-31
MR Monitoring Resolved 2005-07-01 → 2005-09-30
MR Monitoring Resolved 2005-07-01 → 2005-09-30
MR Monitoring Resolved 2005-04-01 → 2005-06-30
MR Monitoring Resolved 2005-04-01 → 2005-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFHXS 0.0041 µg/L 2/8 2025
PFOA 0.0055 µg/L 2/8 2025
PFOS 0.0057 µg/L 2/8 2025

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Arsenic
28 µg/L 280%
of the EPA limit, in the worst sample — 10 µg/L
 302/321 SYR4 2012–2019
Lead
0.0015 mg/L 10%
of the EPA limit 0.0150 mg/L
 59/59 LCR 2025
Bromodichloromethane
10 µg/L
No EPA limit set
 44/44 SYR4 2012–2019
Bromoform
5.8 µg/L
No EPA limit set
 44/44 SYR4 2012–2019
Chloroform
9.1 µg/L
No EPA limit set
 44/44 SYR4 2012–2019
Dibromochloromethane
11 µg/L
No EPA limit set
 44/44 SYR4 2012–2019
TTHM
31 µg/L 39%
of the EPA limit 80 µg/L
 44/44 SYR4 2012–2019
Nitrate
361.6 µg/L 3.6%
of the EPA limit 10000 µg/L
 40/336 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
28 µg/L 47%
of the EPA limit 60 µg/L
 35/44 SYR4 2012–2019
Trichloroacetic Acid
4.3 µg/L
No EPA limit set
 34/44 SYR4 2012–2019
Dichloroacetic Acid
7 µg/L
No EPA limit set
 33/44 SYR4 2012–2019
Dibromoacetic Acid
2.6 µg/L
No EPA limit set
 26/44 SYR4 2012–2019
Fluoride
900 µg/L 23%
of the EPA limit 4000 µg/L
 18/18 SYR4 2012–2018
Monochloroacetic Acid
23 µg/L
No EPA limit set
 13/44 SYR4 2012–2019
Monobromoacetic Acid
2.6 µg/L
No EPA limit set
 7/44 SYR4 2012–2019
Barium
310 µg/L 16%
of the EPA limit 2000 µg/L
 4/5 SYR4 2012–2018
Lithium
37 µg/L
No EPA limit set
 4/8 UCMR-5 2025
Combined Uranium
2.4287 µg/L 8.1%
of the EPA limit 30 µg/L
 2/2 SYR4 2014–2015
Copper
700 µg/L 54%
of the EPA limit 1300 µg/L
 1/96 SYR4 2012–2019
Selenium
6.2 µg/L 12%
of the EPA limit 50 µg/L
 1/5 SYR4 2012–2018
87 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
RUGGE, PAUL
Phone
951-789-5155
Email
PRugge@wmwd.com

Frequently asked questions about Western Mwd - Murrieta Division

Is Western Mwd - Murrieta Division tap water safe to drink?

EPA monitoring detected 23 contaminants in Western Mwd - Murrieta Division's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Western Mwd - Murrieta Division's water?

EPA monitoring detected Arsenic, Lead, Bromodichloromethane, Bromoform, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Western Mwd - Murrieta Division serve?

Western Mwd - Murrieta Division reports serving 17,453 people in California, per its EPA record.

Has Western Mwd - Murrieta Division had any water quality violations?

The EPA has 14 violations on file for Western Mwd - Murrieta Division, of which 4 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.