Is Trenton Water Works Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Mercer

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.

107

health-based violations

499

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	2024-10-01 → 2024-12-31
MCL	Health-based	Archived	2024-10-01 → 2024-12-31
MCL	Health-based	Archived	2024-10-01 → 2024-12-31
TT	Health-based	Resolved	2021-07-01 → 2021-07-31
TT	Health-based	Resolved	2021-07-01 → 2021-07-31
MCL	Health-based	Archived	2021-07-01 → 2021-09-30
MCL	Health-based	Archived	2021-07-01 → 2021-09-30
MCL	Health-based	Archived	2021-07-01 → 2021-09-30
TT	Health-based	Resolved	2021-01-01 → 2021-06-30
TT	Health-based	Resolved	2021-01-01 → 2021-06-30

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	31.4 µg/L 209% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 1430 µg/L	461/708	SYR4	2012–2019
Copper	145 µg/L 11% of the EPA limit 1300 µg/L worst single sample: 640 µg/L	341/715	SYR4	2012–2019
Bromodichloromethane	14.285 µg/L No EPA limit set worst single sample: 19.9 µg/L	264/264	SYR4	2012–2019
Chloroform	76.76 µg/L No EPA limit set worst single sample: 127 µg/L	264/264	SYR4	2012–2019
Dibromochloromethane	4.683 µg/L No EPA limit set worst single sample: 5.95 µg/L	260/264	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	70.04 µg/L 117% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 88.5 µg/L	257/257	SYR4	2012–2019
Dichloroacetic Acid	34.25 µg/L No EPA limit set worst single sample: 51.2 µg/L	256/257	SYR4	2012–2019
TTHM	90.95 µg/L 114% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 142 µg/L	256/256	SYR4	2012–2019
Trichloroacetic Acid	41 µg/L No EPA limit set worst single sample: 64.2 µg/L	253/257	SYR4	2012–2019
Monochloroacetic Acid	11.09 µg/L No EPA limit set worst single sample: 15.2 µg/L	95/257	SYR4	2012–2019
Monobromoacetic Acid	2.63 µg/L No EPA limit set worst single sample: 3.44 µg/L	53/257	SYR4	2012–2019
Dibromoacetic Acid	1.168 µg/L No EPA limit set worst single sample: 1.21 µg/L	45/257	SYR4	2012–2019
Lead	0.0060 mg/L 40% of the EPA limit 0.0150 mg/L	34/34	LCR	2026
Nitrate	1300 µg/L 13% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Fluoride	1284 µg/L 32% of the EPA limit 4000 µg/L worst single sample: 1340 µg/L	8/8	SYR4	2012–2019
Barium	327.5 µg/L 16% of the EPA limit 2000 µg/L worst single sample: 339 µg/L	6/8	SYR4	2012–2019
Chromium	2.614 µg/L 2.6% of the EPA limit 100 µg/L worst single sample: 2.94 µg/L	5/8	SYR4	2012–2019
Di(2-ethylhexyl) Phthalate	0.2910 µg/L 4.9% of the EPA limit 6 µg/L worst single sample: 0.3100 µg/L	3/5	SYR4	2012–2018
Arsenic	1.00065 µg/L 10% of the EPA limit 10 µg/L worst single sample: 1.04 µg/L	2/8	SYR4	2012–2019
Mercury	0.0959 µg/L 4.8% of the EPA limit 2 µg/L worst single sample: 0.0990 µg/L	2/7	SYR4	2013–2019
2,4-D	0.1480 µg/L 0.2% of the EPA limit 70 µg/L	1/4	SYR4	2012–2018
Atrazine	0.2300 µg/L 7.7% of the EPA limit 3 µg/L	1/7	SYR4	2012–2018
Benzo(A)Pyrene	0.0200 µg/L 10% of the EPA limit 0.2000 µg/L	1/6	SYR4	2012–2018
Bromoform	0.8900 µg/L No EPA limit set	1/264	SYR4	2012–2019
Selenium	2.12 µg/L 4.2% of the EPA limit 50 µg/L	1/8	SYR4	2012–2019

75 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-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideCombined Radium (-226 And -228)Combined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: SEMPLE, SEAN
Phone: 609-433-4749
Email: [email protected]

Frequently asked questions about Trenton Water Works

Is Trenton Water Works tap water safe to drink?

EPA monitoring detected 25 contaminants in Trenton Water Works'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 Trenton Water Works's water?

EPA monitoring detected Lead, Copper, Bromodichloromethane, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Trenton Water Works serve?

Trenton Water Works reports serving 217,000 people in New Jersey, per its EPA record.

Has Trenton Water Works had any water quality violations?

The EPA has 499 violations on file for Trenton Water Works, of which 107 are health-based (a contaminant limit or required treatment was breached) and 7 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.