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Tap water quality report

Lake Hemet Mwd

EPA monitoring tested this supplier for 111 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

111
contaminants tested
20
detected
52,913
people served
4
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
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
8
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2022-06-01 → 2022-06-30
MCL Health-based Resolved 2022-06-01 → 2022-06-30
MCL Health-based Resolved 2002-10-01 → 2002-10-31
MCL Health-based Resolved 2002-10-01 → 2002-10-31
MR Monitoring Resolved 2022-07-01
MR Monitoring Resolved 2022-07-01
MR Monitoring Resolved 2009-04-01 → 2010-03-31
MR Monitoring Resolved 2009-04-01 → 2010-03-31

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
Nitrate
21000 µg/L 210%
of the EPA limit, in the worst sample — 10000 µg/L
 556/562 SYR4 2012–2019
Fluoride
530 µg/L 13%
of the EPA limit 4000 µg/L
 40/42 SYR4 2012–2019
TTHM
15 µg/L 19%
of the EPA limit 80 µg/L
 38/42 SYR4 2012–2019
Dibromochloromethane
6.4 µg/L
No EPA limit set
 37/46 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 37/37 LCR 2025
Bromoform
4.2 µg/L
No EPA limit set
 33/47 SYR4 2012–2019
Bromodichloromethane
4.6 µg/L
No EPA limit set
 32/46 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
22 µg/L 37%
of the EPA limit 60 µg/L
 28/40 SYR4 2012–2019
Chloroform
4.2 µg/L
No EPA limit set
 23/46 SYR4 2012–2019
Monochloroacetic Acid
20 µg/L
No EPA limit set
 23/40 SYR4 2012–2019
Nitrate-Nitrite
1000000 µg/L 10000%
of the EPA limit, in the worst sample — 10000 µg/L
 21/21 SYR4 2012–2019
Combined Uranium
11.3091 µg/L 38%
of the EPA limit 30 µg/L
 19/19 SYR4 2012–2017
Barium
240 µg/L 12%
of the EPA limit 2000 µg/L
 15/29 SYR4 2012–2019
Dibromoacetic Acid
2.7 µg/L
No EPA limit set
 14/40 SYR4 2012–2019
Monobromoacetic Acid
2.6 µg/L
No EPA limit set
 10/40 SYR4 2012–2019
Chromium
1.9 µg/L 1.9%
of the EPA limit 100 µg/L
 6/29 SYR4 2012–2019
Lithium
16.2 µg/L
No EPA limit set
 6/19 UCMR-5 2025
Selenium
6 µg/L 12%
of the EPA limit 50 µg/L
 3/29 SYR4 2012–2019
Arsenic
7.6 µg/L 76%
of the EPA limit 10 µg/L
 2/32 SYR4 2012–2019
Dichloroacetic Acid
1.1 µg/L
No EPA limit set
 1/40 SYR4 2012–2019
91 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, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GOW, MIKE
Phone
951-658-3241
Email
mgow@lhmwd.org

Frequently asked questions about Lake Hemet Mwd

Is Lake Hemet Mwd tap water safe to drink?

EPA monitoring detected 20 contaminants in Lake Hemet Mwd'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 Lake Hemet Mwd's water?

EPA monitoring detected Nitrate, Fluoride, TTHM, Dibromochloromethane, Lead, and others. The full list with the level and data source for each is above.

How many people does Lake Hemet Mwd serve?

Lake Hemet Mwd reports serving 52,913 people in California, per its EPA record.

Has Lake Hemet Mwd had any water quality violations?

The EPA has 8 violations on file for Lake Hemet Mwd, 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.