Is City of Orange Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Orange

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
MR	Monitoring	Resolved	2018-10-01
MR	Monitoring	Resolved	2018-10-01

PFAS detected

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

Contaminant	Max	Detection rate	Period
Pfpea	0.0177 µg/L	15/28	2025
Pfhxa	0.0101 µg/L	12/28	2025
Pfba	0.0126 µg/L	11/28	2025
PFOS	0.0170 µg/L	5/28	2025
PFHXS	0.0102 µg/L	4/28	2025
PFOA	0.0093 µg/L	4/28	2025
PFBS	0.0033 µg/L	3/28	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 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	3590.01 µg/L 36% of the EPA limit 10000 µg/L worst single sample: 3887.2 µg/L	302/302	SYR4	2012–2019
TTHM	59.67 µg/L 75% of the EPA limit 80 µg/L worst single sample: 84.8 µg/L	219/244	SYR4	2012–2019
Bromodichloromethane	16.49 µg/L No EPA limit set worst single sample: 22.3 µg/L	214/245	SYR4	2012–2019
Dibromochloromethane	20 µg/L No EPA limit set worst single sample: 27.9 µg/L	212/245	SYR4	2012–2019
Bromoform	11.7 µg/L No EPA limit set worst single sample: 14.3 µg/L	211/245	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	21.8 µg/L 36% of the EPA limit 60 µg/L worst single sample: 30 µg/L	191/224	SYR4	2012–2019
Chloroform	17.985 µg/L No EPA limit set worst single sample: 27.5 µg/L	184/245	SYR4	2012–2019
Dichloroacetic Acid	10.73 µg/L No EPA limit set worst single sample: 13 µg/L	163/224	SYR4	2012–2019
Dibromoacetic Acid	6.62 µg/L No EPA limit set worst single sample: 8.3 µg/L	159/224	SYR4	2012–2019
Trichloroacetic Acid	8.57 µg/L No EPA limit set worst single sample: 9.4 µg/L	103/224	SYR4	2012–2019
Nitrate-Nitrite	3191 µg/L 32% of the EPA limit 10000 µg/L worst single sample: 840000 µg/L	74/74	SYR4	2013–2019
Fluoride	452 µg/L 11% of the EPA limit 4000 µg/L worst single sample: 500 µg/L	49/49	SYR4	2012–2019
Combined Uranium	13.1209 µg/L 44% of the EPA limit 30 µg/L worst single sample: 13.5292 µg/L	33/33	SYR4	2012–2019
Barium	123 µg/L 6.2% of the EPA limit 2000 µg/L worst single sample: 130 µg/L	23/57	SYR4	2012–2019
Lead	0.0023 mg/L 16% of the EPA limit 0.0150 mg/L	20/20	LCR	2024
Lithium	35.2774 µg/L No EPA limit set	15/28	UCMR-5	2025
Arsenic	5.58 µg/L 56% of the EPA limit 10 µg/L worst single sample: 5.7 µg/L	4/60	SYR4	2012–2019
Monobromoacetic Acid	1.76 µg/L No EPA limit set worst single sample: 1.8 µg/L	3/224	SYR4	2012–2019
Monochloroacetic Acid	2.46 µg/L No EPA limit set worst single sample: 2.5 µg/L	3/224	SYR4	2012–2019

83 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: TRAN, SON
Phone: 714-288-2475
Email: [email protected]

Frequently asked questions about City of Orange

Is City of Orange tap water safe to drink?

EPA monitoring detected 26 contaminants in City of Orange'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 City of Orange's water?

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

How many people does City of Orange serve?

City of Orange reports serving 120,770 people in California, per its EPA record.

Has City of Orange had any water quality violations?

The EPA has 2 violations on file for City of Orange, 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.