Is Quincy Tap Water Safe? Quality Report

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

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
Other	Monitoring	Unaddressed	2025-07-01
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30

PFAS detected

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

Contaminant	Max	Detection rate	Period
Pfba	0.0135 µg/L	4/4	2025
PFBS	0.0057 µg/L	1/4	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 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
Bromodichloromethane	9.0015 µg/L No EPA limit set worst single sample: 11.7 µg/L	108/108	SYR4	2012–2019
Chloroform	70.185 µg/L No EPA limit set worst single sample: 220 µg/L	108/108	SYR4	2012–2019
TTHM	77.28 µg/L 97% of the EPA limit 80 µg/L worst single sample: 230 µg/L	108/108	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	41.585 µg/L 69% of the EPA limit 60 µg/L worst single sample: 72.7 µg/L	108/108	SYR4	2012–2019
Trichloroacetic Acid	13.455 µg/L No EPA limit set worst single sample: 18.9 µg/L	104/108	SYR4	2012–2019
Dichloroacetic Acid	31.03 µg/L No EPA limit set worst single sample: 53.8 µg/L	99/108	SYR4	2012–2019
Dibromochloromethane	2.509 µg/L No EPA limit set worst single sample: 3.243 µg/L	75/108	SYR4	2012–2019
Copper	62.7 µg/L 4.8% of the EPA limit 1300 µg/L worst single sample: 86 µg/L	59/60	SYR4	2014–2017
Lead	34.15 µg/L 228% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 37 µg/L	20/60	SYR4	2014–2017
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	19/19	LCR	2025
Monochloroacetic Acid	4.5935 µg/L No EPA limit set worst single sample: 4.67 µg/L	18/108	SYR4	2012–2019
Nitrate	4500 µg/L 45% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Monobromoacetic Acid	13.66 µg/L No EPA limit set worst single sample: 19.9 µg/L	14/108	SYR4	2012–2019
Barium	21.8 µg/L 1.1% of the EPA limit 2000 µg/L worst single sample: 26 µg/L	8/8	SYR4	2012–2019
Fluoride	991.6 µg/L 25% of the EPA limit 4000 µg/L worst single sample: 1000 µg/L	8/8	SYR4	2012–2019
Nitrate-Nitrite	2610 µg/L 26% of the EPA limit 10000 µg/L worst single sample: 2700 µg/L	3/3	SYR4	2012–2018
Toluene	1.1705 µg/L 0.1% of the EPA limit 1000 µg/L worst single sample: 1.2 µg/L	2/14	SYR4	2012–2019
Arsenic	1.3 µg/L 13% of the EPA limit 10 µg/L	1/8	SYR4	2012–2019
Selenium	3.2 µg/L 6.4% of the EPA limit 50 µg/L	1/8	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, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: CONTE, JEFFREY
Phone: 217-228-7732
Email: [email protected]

Frequently asked questions about Quincy

Is Quincy tap water safe to drink?

EPA monitoring detected 21 contaminants in Quincy'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 Quincy's water?

EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Quincy serve?

Quincy reports serving 42,000 people in Illinois, per its EPA record.

Has Quincy had any water quality violations?

The EPA has 74 violations on file for Quincy, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.