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Tap water quality report

Holland Heights Mutual Water Company

EPA monitoring tested this supplier for 70 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
12
detected
300
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
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.

0
health-based violations
20
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2010-01-01 → 2012-12-31
MR Monitoring Resolved 2010-01-01 → 2012-12-31
MR Monitoring Resolved 2010-01-01 → 2012-12-31
MR Monitoring Resolved 2010-01-01 → 2012-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2005-01-01 → 2005-12-31
MR Monitoring Resolved 2005-01-01 → 2005-12-31
MR Monitoring Resolved 1996-11-01 → 1996-11-30
MR Monitoring Resolved 1996-11-01 → 1996-11-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 20/20 LCR 2024
Bromodichloromethane
3.9 µg/L
No EPA limit set
 4/4 SYR4 2013–2017
Bromoform
4.085 µg/L
No EPA limit set
worst single sample: 4.1 µg/L
4/4 SYR4 2013–2017
Dibromochloromethane
5.925 µg/L
No EPA limit set
worst single sample: 6 µg/L
4/4 SYR4 2013–2017
TTHM
15.85 µg/L 20%
of the EPA limit 80 µg/L
worst single sample: 16 µg/L
4/4 SYR4 2013–2017
Chloroform
2.55 µg/L
No EPA limit set
worst single sample: 2.6 µg/L
3/4 SYR4 2013–2017
Dibromoacetic Acid
3.79 µg/L
No EPA limit set
worst single sample: 4.05 µg/L
3/4 SYR4 2013–2017
Total Haloacetic Acids (HAA5)
6.51 µg/L 11%
of the EPA limit 60 µg/L
worst single sample: 6.81 µg/L
3/4 SYR4 2013–2017
Dichloroacetic Acid
1.19 µg/L
No EPA limit set
worst single sample: 1.2 µg/L
2/4 SYR4 2013–2017
Fluoride
228.5 µg/L 5.7%
of the EPA limit 4000 µg/L
worst single sample: 230 µg/L
2/5 SYR4 2013–2019
Trichloroacetic Acid
1.55 µg/L
No EPA limit set
worst single sample: 1.56 µg/L
2/4 SYR4 2013–2017
Barium
220 µg/L 11%
of the EPA limit 2000 µg/L
 1/5 SYR4 2013–2019
58 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-GammaBenzeneBeryllium, TotalChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CHIRHART, MIKE
Phone
707-545-5883
Email
[email protected]

Frequently asked questions about Holland Heights Mutual Water Company

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

EPA monitoring detected 12 contaminants in Holland 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 Holland Heights Mutual Water Company's water?

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

How many people does Holland Heights Mutual Water Company serve?

Holland Heights Mutual Water Company reports serving 300 people in California, per its EPA record.

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

The EPA has 20 violations on file for Holland Heights Mutual Water Company, of which 0 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.