Is Melita Heights Mutual Water Company Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Sonoma

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
RPT	Monitoring	Unaddressed	2025-07-02
MR	Monitoring	Addressed	2024-01-01
MR	Monitoring	Addressed	2023-01-01
MR	Monitoring	Archived	2018-01-01 → 2020-12-31
MR	Monitoring	Archived	2018-01-01 → 2020-12-31
MR	Monitoring	Resolved	2012-07-01 → 2012-07-31
MR	Monitoring	Resolved	2012-07-01 → 2012-07-31
MR	Monitoring	Resolved	2009-06-01
MR	Monitoring	Resolved	2009-06-01
MR	Monitoring	Resolved	2007-09-01 → 2007-09-30

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
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	17/17	LCR	2024
Fluoride	325 µg/L 8.1% of the EPA limit 4000 µg/L worst single sample: 330 µg/L	3/3	SYR4	2012–2018
Dichloroacetic Acid	1.922 µg/L No EPA limit set worst single sample: 1.96 µg/L	2/3	SYR4	2013–2017
Total Haloacetic Acids (HAA5)	5.038 µg/L 8.4% of the EPA limit 60 µg/L worst single sample: 5.24 µg/L	2/3	SYR4	2013–2017
Dibromoacetic Acid	3.28 µg/L No EPA limit set	1/3	SYR4	2013–2017
Dibromochloromethane	0.5100 µg/L No EPA limit set	1/3	SYR4	2013–2017
TTHM	0.5100 µg/L 0.6% of the EPA limit 80 µg/L	1/3	SYR4	2013–2017

63 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBariumBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DELLAVALLE, PETER
Phone: 707-490-5040
Email: [email protected]

Frequently asked questions about Melita Heights Mutual Water Company

Is Melita Heights Mutual Water Company tap water safe to drink?

EPA monitoring detected 7 contaminants in Melita Heights Mutual Water Company'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 Melita Heights Mutual Water Company's water?

EPA monitoring detected Lead, Fluoride, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), Dibromoacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Melita Heights Mutual Water Company serve?

Melita Heights Mutual Water Company reports serving 64 people in California, per its EPA record.

Has Melita Heights Mutual Water Company had any water quality violations?

The EPA has 26 violations on file for Melita Heights Mutual Water Company, of which 0 are health-based (a contaminant limit or required treatment was breached) and 3 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.