Is Edwardsville Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Madison

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	Resolved	2025-07-01
Other	Monitoring	Resolved	2025-07-01
MR	Monitoring	Resolved	2013-08-01 → 2013-08-31
MR	Monitoring	Resolved	2013-08-01 → 2013-08-31
MR	Monitoring	Resolved	2013-07-01 → 2013-09-30
MR	Monitoring	Resolved	2013-07-01 → 2013-09-30
MR	Monitoring	Resolved	2009-12-01 → 2009-12-31
MR	Monitoring	Resolved	2009-12-01 → 2009-12-31
MR	Monitoring	Resolved	2009-12-01 → 2009-12-31
MR	Monitoring	Resolved	2009-12-01 → 2009-12-31

PFAS detected

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

Contaminant	Max	Detection rate	Period
PFBS	0.0035 µg/L	2/2	2024

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
Copper	667 µg/L 51% of the EPA limit 1300 µg/L worst single sample: 1300 µg/L	60/60	SYR4	2014–2017
Bromodichloromethane	10.9245 µg/L No EPA limit set worst single sample: 12 µg/L	32/32	SYR4	2012–2019
Chloroform	11.2 µg/L No EPA limit set worst single sample: 12.63 µg/L	32/32	SYR4	2012–2019
Dibromochloromethane	7.7731 µg/L No EPA limit set worst single sample: 9.03 µg/L	32/32	SYR4	2012–2019
TTHM	32.081 µg/L 40% of the EPA limit 80 µg/L worst single sample: 35 µg/L	32/32	SYR4	2012–2019
Lead	4.515 µg/L 30% of the EPA limit 15 µg/L worst single sample: 9.7 µg/L	28/60	SYR4	2014–2017
Bromoform	2.261 µg/L No EPA limit set worst single sample: 2.62 µg/L	27/32	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	9.5025 µg/L 16% of the EPA limit 60 µg/L worst single sample: 11.6 µg/L	24/32	SYR4	2012–2019
Dibromoacetic Acid	2.9 µg/L No EPA limit set worst single sample: 3.7 µg/L	21/32	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	18/18	LCR	2026
Nitrate	1300 µg/L 13% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Trichloroacetic Acid	3.56 µg/L No EPA limit set worst single sample: 4.4 µg/L	15/32	SYR4	2012–2019
Dichloroacetic Acid	5.47 µg/L No EPA limit set worst single sample: 5.5 µg/L	6/32	SYR4	2012–2019
Barium	83.7 µg/L 4.2% of the EPA limit 2000 µg/L worst single sample: 85 µg/L	3/3	SYR4	2012–2018
Fluoride	1129 µg/L 28% of the EPA limit 4000 µg/L worst single sample: 1140 µg/L	3/3	SYR4	2012–2018
Nitrate-Nitrite	1261 µg/L 13% of the EPA limit 10000 µg/L worst single sample: 1300 µg/L	3/3	SYR4	2012–2018
Arsenic	1 µg/L 10% of the EPA limit 10 µg/L	1/3	SYR4	2012–2018
Combined Radium (-226 And -228)	1.328 pCi/L 27% of the EPA limit 5 pCi/L	1/1	SYR4	2014
Monobromoacetic Acid	3.38 µg/L No EPA limit set	1/32	SYR4	2012–2019

88 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, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ZWIJACK, RYAN
Phone: 618-791-2685
Email: [email protected]

Frequently asked questions about Edwardsville

Is Edwardsville tap water safe to drink?

EPA monitoring detected 20 contaminants in Edwardsville'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 Edwardsville's water?

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

How many people does Edwardsville serve?

Edwardsville reports serving 26,808 people in Illinois, per its EPA record.

Has Edwardsville had any water quality violations?

The EPA has 18 violations on file for Edwardsville, 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.