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Tap water quality report

Aqua Illinois-Willowbrook

EPA monitoring tested this supplier for 108 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
18
detected
5,100
people served
0
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Ground water
Ownership
Private
Counties served
Will

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.

0
health-based violations
15
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2020-07-01 → 2020-07-31
MON Monitoring Resolved 2020-07-01 → 2020-07-31
MON Monitoring Resolved 2020-07-01 → 2020-07-31
MON Monitoring Resolved 2020-07-01 → 2020-07-31
MR Monitoring Resolved 2020-07-01 → 2020-09-30
MR Monitoring Resolved 2020-07-01 → 2020-09-30
MR Monitoring Resolved 2020-07-01 → 2020-09-30
MR Monitoring Resolved 2020-07-01 → 2020-09-30
RPT Monitoring Resolved 2020-06-01
RPT Monitoring Resolved 2020-06-01

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
1000 µg/L 77%
of the EPA limit 1300 µg/L
worst single sample: 1200 µg/L
40/40 SYR4 2014–2017
Nitrate
56.5 µg/L 0.6%
of the EPA limit 10000 µg/L
worst single sample: 60 µg/L
28/48 SYR4 2012–2019
Lead
5.7 µg/L 38%
of the EPA limit 15 µg/L
worst single sample: 6.1 µg/L
26/40 SYR4 2014–2017
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2023
Barium
58.65 µg/L 2.9%
of the EPA limit 2000 µg/L
worst single sample: 59 µg/L
8/8 SYR4 2012–2018
Bromodichloromethane
4.952 µg/L
No EPA limit set
worst single sample: 5.19 µg/L
8/8 SYR4 2013–2019
Chloroform
20.4645 µg/L
No EPA limit set
worst single sample: 22.33 µg/L
8/8 SYR4 2013–2019
Dibromochloromethane
1.77345 µg/L
No EPA limit set
worst single sample: 1.89 µg/L
8/8 SYR4 2013–2019
Fluoride
1286.5 µg/L 32%
of the EPA limit 4000 µg/L
worst single sample: 1360 µg/L
8/8 SYR4 2012–2018
TTHM
26.848 µg/L 34%
of the EPA limit 80 µg/L
worst single sample: 28.92 µg/L
8/8 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
19.52 µg/L 33%
of the EPA limit 60 µg/L
worst single sample: 19.8 µg/L
8/8 SYR4 2013–2019
Trichloroacetic Acid
10.88 µg/L
No EPA limit set
worst single sample: 11.3 µg/L
8/8 SYR4 2013–2019
Dichloroacetic Acid
9.375 µg/L
No EPA limit set
worst single sample: 9.7 µg/L
6/8 SYR4 2013–2019
Lithium
52 µg/L
No EPA limit set
 6/6 UCMR-5 2023
Nitrate-Nitrite
46 µg/L 0.5%
of the EPA limit 10000 µg/L
worst single sample: 50 µg/L
5/7 SYR4 2012–2018
Combined Radium (-226 And -228)
2.181 pCi/L 44%
of the EPA limit 5 pCi/L
worst single sample: 2.22 pCi/L
2/2 SYR4 2014
Arsenic
1.2 µg/L 12%
of the EPA limit 10 µg/L
 1/8 SYR4 2012–2018
Monobromoacetic Acid
3.36 µg/L
No EPA limit set
 1/8 SYR4 2013–2019
90 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 EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MACK, JENNIFER
Phone
224-602-6779
Email
[email protected]

Frequently asked questions about Aqua Illinois-Willowbrook

Is Aqua Illinois-Willowbrook tap water safe to drink?

EPA monitoring detected 18 contaminants in Aqua Illinois-Willowbrook'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 Aqua Illinois-Willowbrook's water?

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

How many people does Aqua Illinois-Willowbrook serve?

Aqua Illinois-Willowbrook reports serving 5,100 people in Illinois, per its EPA record.

Has Aqua Illinois-Willowbrook had any water quality violations?

The EPA has 15 violations on file for Aqua Illinois-Willowbrook, 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.