Is Western Mwd - Murrieta Division Tap Water Safe? Quality Report

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
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).

Contaminant	Max	Detection rate	Period
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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Arsenic	18.95 µg/L 190% of the EPA limit, at the 95th percentile of samples — 10 µg/L worst single sample: 28 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	8.94 µg/L No EPA limit set worst single sample: 10 µg/L	44/44	SYR4	2012–2019
Bromoform	4.425 µg/L No EPA limit set worst single sample: 5.8 µg/L	44/44	SYR4	2012–2019
Chloroform	8.525 µg/L No EPA limit set worst single sample: 9.1 µg/L	44/44	SYR4	2012–2019
Dibromochloromethane	8.17 µg/L No EPA limit set worst single sample: 11 µg/L	44/44	SYR4	2012–2019
TTHM	26 µg/L 33% of the EPA limit 80 µg/L worst single sample: 31 µg/L	44/44	SYR4	2012–2019
Nitrate	318.66 µg/L 3.2% of the EPA limit 10000 µg/L worst single sample: 361.6 µg/L	40/336	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	25.2 µg/L 42% of the EPA limit 60 µg/L worst single sample: 28 µg/L	35/44	SYR4	2012–2019
Trichloroacetic Acid	3.305 µg/L No EPA limit set worst single sample: 4.3 µg/L	34/44	SYR4	2012–2019
Dichloroacetic Acid	4.66 µg/L No EPA limit set worst single sample: 7 µg/L	33/44	SYR4	2012–2019
Dibromoacetic Acid	2.6 µg/L No EPA limit set	26/44	SYR4	2012–2019
Fluoride	815 µg/L 20% of the EPA limit 4000 µg/L worst single sample: 900 µg/L	18/18	SYR4	2012–2018
Monochloroacetic Acid	22.4 µg/L No EPA limit set worst single sample: 23 µg/L	13/44	SYR4	2012–2019
Monobromoacetic Acid	2.48 µg/L No EPA limit set worst single sample: 2.6 µg/L	7/44	SYR4	2012–2019
Barium	295 µg/L 15% of the EPA limit 2000 µg/L worst single sample: 310 µg/L	4/5	SYR4	2012–2018
Lithium	37 µg/L No EPA limit set	4/8	UCMR-5	2025
Combined Uranium	2.34809 µg/L 7.8% of the EPA limit 30 µg/L worst single sample: 2.4287 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: [email protected]

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.