Is Alco Water Service Tap Water Safe? Quality Report

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

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	1994-09-01 → 1994-09-30
MCL	Health-based	Resolved	1994-09-01 → 1994-09-30
MCL	Health-based	Resolved	1992-11-01 → 1992-11-30
MCL	Health-based	Resolved	1992-11-01 → 1992-11-30
MCL	Health-based	Resolved	1992-11-01 → 1992-11-30
MCL	Health-based	Resolved	1992-11-01 → 1992-11-30
MR	Monitoring	Resolved	1989-01-01 → 1991-12-31
MR	Monitoring	Resolved	1989-01-01 → 1991-12-31

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 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
Nitrate	8989 µg/L 90% of the EPA limit 10000 µg/L worst single sample: 11000 µg/L	304/304	SYR4	2012–2019
TTHM	2.82 µg/L 3.5% of the EPA limit 80 µg/L worst single sample: 3.7 µg/L	40/96	SYR4	2013–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	34/34	LCR	2025
Bromoform	2.055 µg/L No EPA limit set worst single sample: 2.3 µg/L	30/96	SYR4	2013–2019
Arsenic	15.95 µg/L 160% of the EPA limit, at the 95th percentile of samples — 10 µg/L worst single sample: 43 µg/L	24/24	SYR4	2012–2019
Barium	81.8 µg/L 4.1% of the EPA limit 2000 µg/L worst single sample: 89 µg/L	19/19	SYR4	2012–2019
Chromium	5.71 µg/L 5.7% of the EPA limit 100 µg/L worst single sample: 5.8 µg/L	19/19	SYR4	2012–2019
Fluoride	570 µg/L 14% of the EPA limit 4000 µg/L worst single sample: 660 µg/L	19/19	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	17 µg/L 28% of the EPA limit 60 µg/L worst single sample: 35 µg/L	19/96	SYR4	2013–2019
Nitrate-Nitrite	10200 µg/L 102% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 11000 µg/L	17/17	SYR4	2016–2019
Monochloroacetic Acid	22 µg/L No EPA limit set worst single sample: 35 µg/L	14/96	SYR4	2013–2019
Lithium	65.1 µg/L No EPA limit set	12/12	UCMR-5	2023
Selenium	2.815 µg/L 5.6% of the EPA limit 50 µg/L worst single sample: 3.2 µg/L	8/19	SYR4	2012–2019
Dibromoacetic Acid	3.675 µg/L No EPA limit set worst single sample: 4.4 µg/L	6/96	SYR4	2013–2019
Lead	3.78 µg/L 25% of the EPA limit 15 µg/L worst single sample: 4.4 µg/L	5/19	SYR4	2012–2019
Antimony, Total	0.5675 µg/L 9.5% of the EPA limit 6 µg/L worst single sample: 0.5700 µg/L	2/19	SYR4	2012–2019
Dibromochloromethane	1.395 µg/L No EPA limit set worst single sample: 1.4 µg/L	2/96	SYR4	2013–2019
Copper	440 µg/L 34% of the EPA limit 1300 µg/L	1/19	SYR4	2012–2019
Monobromoacetic Acid	1.1 µg/L No EPA limit set	1/96	SYR4	2013–2019

76 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBeryllium, TotalBromodichloromethaneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChloroformDichloromethaneDalaponDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEthylbenzeneHfpo-DaLassoMercuryNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ADCOCK, THOMAS
Phone: 831-424-0441
Email: tom@alcowater.com

Frequently asked questions about Alco Water Service

Is Alco Water Service tap water safe to drink?

EPA monitoring detected 19 contaminants in Alco Water Service'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 Alco Water Service's water?

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

How many people does Alco Water Service serve?

Alco Water Service reports serving 56,253 people in California, per its EPA record.

Has Alco Water Service had any water quality violations?

The EPA has 8 violations on file for Alco Water Service, of which 6 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.