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Tap water quality report

City of Tustin

EPA monitoring tested this supplier for 109 contaminants and detected 23. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
23
detected
66,600
people served
4
health-based violations
California rankingsLead in CaliforniaPFAS in California
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.

4
health-based violations
12
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1998-08-15 → 1998-09-16
MCL Health-based Resolved 1998-08-15 → 1998-09-16
MCL Health-based Archived 1982-10-01 → 1982-10-31
MCL Health-based Archived 1979-10-30 → 1980-01-29
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2016-07-29
MR Monitoring Resolved 2016-07-29

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFHXS 0.0035 µg/L 2/14 2025
PFOS 0.0042 µg/L 1/14 2025
Pfpea 0.0037 µg/L 1/14 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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
20400 µg/L 204%
of the EPA limit, in the worst sample — 10000 µg/L
 1000/1004 SYR4 2012–2019
TTHM
70.4 µg/L 88%
of the EPA limit 80 µg/L
 219/256 SYR4 2012–2019
Bromoform
18.5 µg/L
No EPA limit set
 214/256 SYR4 2012–2019
Dibromochloromethane
20.6 µg/L
No EPA limit set
 196/256 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
23 µg/L 38%
of the EPA limit 60 µg/L
 179/256 SYR4 2012–2019
Bromodichloromethane
19.8 µg/L
No EPA limit set
 176/256 SYR4 2012–2019
Chloroform
28.4 µg/L
No EPA limit set
 153/256 SYR4 2012–2019
Dibromoacetic Acid
7.7 µg/L
No EPA limit set
 144/256 SYR4 2012–2019
Dichloroacetic Acid
10.4 µg/L
No EPA limit set
 124/256 SYR4 2012–2019
Nitrate-Nitrite
20000 µg/L 200%
of the EPA limit, in the worst sample — 10000 µg/L
 122/122 SYR4 2015–2019
Trichloroacetic Acid
7.2 µg/L
No EPA limit set
 102/256 SYR4 2012–2019
Fluoride
280 µg/L 7%
of the EPA limit 4000 µg/L
 32/32 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 24/24 LCR 2024
Combined Uranium
3.9336 µg/L 13%
of the EPA limit 30 µg/L
 23/25 SYR4 2014–2018
Lithium
37.934 µg/L
No EPA limit set
 9/14 UCMR-5 2025
Selenium
10.1 µg/L 20%
of the EPA limit 50 µg/L
 5/34 SYR4 2012–2019
Monochloroacetic Acid
3.5 µg/L
No EPA limit set
 2/256 SYR4 2012–2019
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/36 SYR4 2012–2019
Barium
100 µg/L 5%
of the EPA limit 2000 µg/L
 1/38 SYR4 2012–2019
Lead
5.6 µg/L 37%
of the EPA limit 15 µg/L
 1/37 SYR4 2012–2019
86 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 EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CHANDLER, MIKE
Phone
714-573-3178
Email
mchandler@tustinca.org

Frequently asked questions about City of Tustin

Is City of Tustin tap water safe to drink?

EPA monitoring detected 23 contaminants in City of Tustin'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 Tustin's water?

EPA monitoring detected Nitrate, TTHM, Bromoform, Dibromochloromethane, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does City of Tustin serve?

City of Tustin reports serving 66,600 people in California, per its EPA record.

Has City of Tustin had any water quality violations?

The EPA has 12 violations on file for City of Tustin, of which 4 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.