Is Gswc - Hollydale Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Los Angeles

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfba	0.0055 µg/L	2/4	2025

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	38/38	LCR	2025
Arsenic	18 µg/L 180% of the EPA limit, in the worst sample — 10 µg/L	25/89	SYR4	2012–2018
Nitrate	2486 µg/L 25% of the EPA limit 10000 µg/L	16/24	SYR4	2012–2019
Fluoride	560 µg/L 14% of the EPA limit 4000 µg/L	12/12	SYR4	2012–2019
TTHM	8.7 µg/L 11% of the EPA limit 80 µg/L	9/12	SYR4	2014–2019
Bromoform	4 µg/L No EPA limit set	7/12	SYR4	2014–2019
Dibromoacetic Acid	2.3 µg/L No EPA limit set	7/14	SYR4	2013–2019
Barium	260 µg/L 13% of the EPA limit 2000 µg/L	6/6	SYR4	2012–2018
Dibromochloromethane	3.7 µg/L No EPA limit set	6/12	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	5.2 µg/L 8.7% of the EPA limit 60 µg/L	6/14	SYR4	2013–2019
Bromodichloromethane	1.6 µg/L No EPA limit set	5/12	SYR4	2014–2019
Combined Uranium	4.023 µg/L 13% of the EPA limit 30 µg/L	2/3	SYR4	2012–2018
Monochloroacetic Acid	4.2 µg/L No EPA limit set	2/14	SYR4	2013–2019
Copper	3 µg/L 0.2% of the EPA limit 1300 µg/L	1/6	SYR4	2012–2018
Monobromoacetic Acid	1 µg/L No EPA limit set	1/14	SYR4	2013–2019
Nitrate-Nitrite	1900 µg/L 19% of the EPA limit 10000 µg/L	1/4	SYR4	2013–2018

64 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDi(2-ethylhexyl) PhthalateDichloroacetic AcidEthylbenzeneHfpo-DaLeadMercuryNetfosaaNfdhaNmefosaaNitritePFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: FLORES, ROCIO
Phone: 626-250-1517
Email: Rocio.Flores@gswater.com

Frequently asked questions about Gswc - Hollydale

Is Gswc - Hollydale tap water safe to drink?

EPA monitoring detected 17 contaminants in Gswc - Hollydale'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 Gswc - Hollydale's water?

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

How many people does Gswc - Hollydale serve?

Gswc - Hollydale reports serving 8,099 people in California, per its EPA record.

Has Gswc - Hollydale had any water quality violations?

The EPA has no formal drinking-water violations on file for Gswc - Hollydale.

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.