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Tap water quality report

Il American-Sterling

EPA monitoring tested this supplier for 109 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
18
detected
14,782
people served
2
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Ground water
Ownership
Private
Counties served
Whiteside

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.

2
health-based violations
5
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1999-02-01 → 1999-02-28
MCL Health-based Archived 1999-02-01 → 1999-02-28
MR Monitoring Archived 2000-07-01 → 2000-07-31
MR Monitoring Archived 2000-07-01 → 2000-07-31
MR Monitoring Archived 1977-06-30 → 1981-06-29

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
1024.4 µg/L 79%
of the EPA limit 1300 µg/L
worst single sample: 1361 µg/L
57/60 SYR4 2014–2017
Dibromochloromethane
17.875 µg/L
No EPA limit set
worst single sample: 21.4 µg/L
46/46 SYR4 2012–2019
TTHM
56.875 µg/L 71%
of the EPA limit 80 µg/L
worst single sample: 67.4 µg/L
46/46 SYR4 2012–2019
Bromoform
32.725 µg/L
No EPA limit set
worst single sample: 34.6 µg/L
44/46 SYR4 2012–2019
Bromodichloromethane
8.9 µg/L
No EPA limit set
worst single sample: 10.1 µg/L
41/46 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
7.66 µg/L 13%
of the EPA limit 60 µg/L
worst single sample: 12.1 µg/L
34/46 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 28/28 LCR 2025
Dibromoacetic Acid
4.21 µg/L
No EPA limit set
worst single sample: 9.3 µg/L
27/46 SYR4 2012–2019
Chloroform
10.125 µg/L
No EPA limit set
worst single sample: 17.1 µg/L
26/46 SYR4 2012–2019
Lead
2.15 µg/L 14%
of the EPA limit 15 µg/L
worst single sample: 3 µg/L
18/60 SYR4 2014–2017
Dichloroacetic Acid
3.6 µg/L
No EPA limit set
worst single sample: 4 µg/L
17/46 SYR4 2012–2019
Combined Radium (-226 And -228)
3.776 pCi/L 76%
of the EPA limit 5 pCi/L
worst single sample: 4 pCi/L
9/9 SYR4 2012–2019
Fluoride
1181 µg/L 30%
of the EPA limit 4000 µg/L
worst single sample: 1190 µg/L
7/7 SYR4 2012–2018
Trichloroacetic Acid
1.79 µg/L
No EPA limit set
worst single sample: 2 µg/L
7/46 SYR4 2012–2019
Monobromoacetic Acid
1.875 µg/L
No EPA limit set
worst single sample: 2 µg/L
6/46 SYR4 2012–2019
Lithium
33.4 µg/L
No EPA limit set
 4/4 UCMR-5 2024
Barium
100 µg/L 5%
of the EPA limit 2000 µg/L
 3/6 SYR4 2012–2018
Gross Beta Particle Activity
9.5435 pCi/L
No EPA limit set
worst single sample: 9.8 pCi/L
2/2 SYR4 2014–2015
91 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitrateNitrate-NitriteNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BOYD, SARAH E.
Phone
618-874-2408
Email
[email protected]

Frequently asked questions about Il American-Sterling

Is Il American-Sterling tap water safe to drink?

EPA monitoring detected 18 contaminants in Il American-Sterling'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 Il American-Sterling's water?

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

How many people does Il American-Sterling serve?

Il American-Sterling reports serving 14,782 people in Illinois, per its EPA record.

Has Il American-Sterling had any water quality violations?

The EPA has 5 violations on file for Il American-Sterling, of which 2 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.