Is Aldercroft Heights County Water District Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Santa Clara

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	1999-02-01 → 1999-02-28
MCL	Health-based	Resolved	1999-02-01 → 1999-02-28
MCL	Health-based	Resolved	1999-02-01 → 1999-02-28
MCL	Health-based	Resolved	1999-02-01 → 1999-02-28
MCL	Health-based	Resolved	1998-10-01 → 1998-10-31
MCL	Health-based	Resolved	1998-10-01 → 1998-10-31
MCL	Health-based	Resolved	1998-10-01 → 1998-10-31
MCL	Health-based	Resolved	1998-10-01 → 1998-10-31
MCL	Health-based	Resolved	1998-10-01 → 1998-10-31
MCL	Health-based	Resolved	1995-04-01 → 1995-04-30

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	2025
Fluoride	180 µg/L 4.5% of the EPA limit 4000 µg/L	14/14	SYR4	2012–2019
Barium	37.55 µg/L 1.9% of the EPA limit 2000 µg/L worst single sample: 38 µg/L	10/14	SYR4	2012–2019
Nitrate	540 µg/L 5.4% of the EPA limit 10000 µg/L	10/38	SYR4	2012–2019
Arsenic	0.6600 µg/L 6.6% of the EPA limit 10 µg/L worst single sample: 0.6700 µg/L	6/14	SYR4	2012–2019
Bromodichloromethane	12.62 µg/L No EPA limit set worst single sample: 13 µg/L	6/6	SYR4	2014–2019
Chloroform	27.7475 µg/L No EPA limit set worst single sample: 27.86 µg/L	6/6	SYR4	2014–2019
Dibromochloromethane	7 µg/L No EPA limit set worst single sample: 7.6 µg/L	6/6	SYR4	2014–2019
Dichloroacetic Acid	10.9 µg/L No EPA limit set worst single sample: 11.9 µg/L	6/6	SYR4	2014–2019
TTHM	42.9875 µg/L 54% of the EPA limit 80 µg/L worst single sample: 43.45 µg/L	6/6	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	19.375 µg/L 32% of the EPA limit 60 µg/L worst single sample: 21.1 µg/L	6/6	SYR4	2014–2019
Trichloroacetic Acid	7.575 µg/L No EPA limit set worst single sample: 7.8 µg/L	6/6	SYR4	2014–2019
Dibromoacetic Acid	2.62 µg/L No EPA limit set worst single sample: 2.7 µg/L	5/6	SYR4	2014–2019
Nitrate-Nitrite	182500 µg/L 1825% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 190000 µg/L	4/13	SYR4	2012–2019
Lead	0.6015 µg/L 4% of the EPA limit 15 µg/L worst single sample: 0.6200 µg/L	2/14	SYR4	2012–2019
Copper	54 µg/L 4.2% of the EPA limit 1300 µg/L	1/14	SYR4	2012–2019
Cadmium	0.8400 µg/L 17% of the EPA limit 5 µg/L	1/14	SYR4	2012–2019

63 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ZENDER, MELISSA
Phone: 408-353-4255
Email: aldercroft.hcwd@gmail.com

Frequently asked questions about Aldercroft Heights County Water District

Is Aldercroft Heights County Water District tap water safe to drink?

EPA monitoring detected 17 contaminants in Aldercroft Heights County Water District'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 Aldercroft Heights County Water District's water?

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

How many people does Aldercroft Heights County Water District serve?

Aldercroft Heights County Water District reports serving 338 people in California, per its EPA record.

Has Aldercroft Heights County Water District had any water quality violations?

The EPA has 55 violations on file for Aldercroft Heights County Water District, of which 22 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.