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Tap water quality report

Lake Forest

EPA monitoring tested this supplier for 107 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

107
contaminants tested
20
detected
19,642
people served
2
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Surface water
Ownership
Local government
Counties served
Lake

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
21
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1994-01-01
TT Health-based Resolved 1992-12-07
MR Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2019-02-01 → 2019-04-30
MR Monitoring Resolved 2019-02-01 → 2019-04-30
MR Monitoring Resolved 2019-02-01 → 2019-04-30
MR Monitoring Resolved 2019-02-01 → 2019-04-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
14.56 µg/L
No EPA limit set
worst single sample: 15.7 µg/L
69/69 SYR4 2012–2019
Chloroform
38.64 µg/L
No EPA limit set
worst single sample: 44.1 µg/L
69/69 SYR4 2012–2019
Dibromochloromethane
6.9552 µg/L
No EPA limit set
worst single sample: 7.7 µg/L
69/69 SYR4 2012–2019
TTHM
58.02 µg/L 73%
of the EPA limit 80 µg/L
worst single sample: 65.5 µg/L
69/69 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
26.92 µg/L 45%
of the EPA limit 60 µg/L
worst single sample: 38.9 µg/L
69/69 SYR4 2012–2019
Trichloroacetic Acid
11.64 µg/L
No EPA limit set
worst single sample: 16.4 µg/L
69/69 SYR4 2012–2019
Dichloroacetic Acid
13.595 µg/L
No EPA limit set
worst single sample: 21 µg/L
62/69 SYR4 2012–2019
Dibromoacetic Acid
2.31 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
51/69 SYR4 2012–2019
Copper
312.15 µg/L 24%
of the EPA limit 1300 µg/L
worst single sample: 371 µg/L
40/64 SYR4 2014–2018
Lead
12.2 µg/L 81%
of the EPA limit 15 µg/L
worst single sample: 14 µg/L
37/64 SYR4 2014–2018
Lead
0.0280 mg/L 187%
above the EPA limit of 0.0150 mg/L
 26/26 LCR 2025
Nitrate
620 µg/L 6.2%
of the EPA limit 10000 µg/L
 14/16 SYR4 2012–2019
Bromoform
2.6719 µg/L
No EPA limit set
worst single sample: 3.4 µg/L
10/69 SYR4 2012–2019
Monobromoacetic Acid
0.6828 µg/L
No EPA limit set
worst single sample: 0.7060 µg/L
9/69 SYR4 2012–2019
Barium
24.6 µg/L 1.2%
of the EPA limit 2000 µg/L
worst single sample: 26 µg/L
8/8 SYR4 2012–2019
Fluoride
1055.5 µg/L 26%
of the EPA limit 4000 µg/L
worst single sample: 1080 µg/L
8/8 SYR4 2012–2019
Monochloroacetic Acid
6.817 µg/L
No EPA limit set
worst single sample: 6.82 µg/L
7/69 SYR4 2012–2019
Arsenic
0.9636 µg/L 9.6%
of the EPA limit 10 µg/L
worst single sample: 0.9880 µg/L
2/8 SYR4 2012–2019
Dalapon
2.8235 µg/L 1.4%
of the EPA limit 200 µg/L
worst single sample: 2.89 µg/L
2/10 SYR4 2012–2019
Selenium
2.2 µg/L 4.4%
of the EPA limit 50 µg/L
 1/8 SYR4 2012–2019
87 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 TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TIEGS, MICHAEL L.
Phone
847-810-4651
Email
[email protected]

Frequently asked questions about Lake Forest

Is Lake Forest tap water safe to drink?

EPA monitoring detected 20 contaminants in Lake Forest'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 Lake Forest's water?

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

How many people does Lake Forest serve?

Lake Forest reports serving 19,642 people in Illinois, per its EPA record.

Has Lake Forest had any water quality violations?

The EPA has 21 violations on file for Lake Forest, 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.