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Tap water quality report

Evanston

EPA monitoring tested this supplier for 108 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
19
detected
74,486
people served
2
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Surface water
Ownership
Local government
Counties served
Cook

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
99
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1992-12-07
TT Health-based Resolved 1992-12-07
MR Monitoring Archived 2001-05-01 → 2001-05-31
MR Monitoring Archived 1996-08-01 → 1996-08-31
MR Monitoring Archived 1996-08-01 → 1996-08-31
MR Monitoring Resolved 1994-04-01 → 1994-06-30
MR Monitoring Resolved 1994-04-01 → 1994-06-30
MR Monitoring Resolved 1994-04-01 → 1994-06-30
MR Monitoring Resolved 1994-04-01 → 1994-06-30
MR Monitoring Resolved 1994-04-01 → 1994-06-30

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
11.7 µg/L
No EPA limit set
worst single sample: 14 µg/L
147/147 SYR4 2012–2019
Chloroform
20 µg/L
No EPA limit set
worst single sample: 25 µg/L
147/147 SYR4 2012–2019
Dibromochloromethane
5.87 µg/L
No EPA limit set
worst single sample: 6.9 µg/L
147/147 SYR4 2012–2019
TTHM
37.4 µg/L 47%
of the EPA limit 80 µg/L
worst single sample: 46.1 µg/L
145/145 SYR4 2012–2019
Trichloroacetic Acid
8.28 µg/L
No EPA limit set
worst single sample: 11 µg/L
145/145 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
12 µg/L 20%
of the EPA limit 60 µg/L
worst single sample: 27.4 µg/L
144/144 SYR4 2012–2019
Dichloroacetic Acid
5.665 µg/L
No EPA limit set
worst single sample: 15 µg/L
140/144 SYR4 2012–2019
Bromoform
0.7000 µg/L
No EPA limit set
worst single sample: 0.9000 µg/L
62/147 SYR4 2012–2019
Copper
343 µg/L 26%
of the EPA limit 1300 µg/L
worst single sample: 540 µg/L
59/60 SYR4 2014–2017
Lead
7.765 µg/L 52%
of the EPA limit 15 µg/L
worst single sample: 11 µg/L
52/60 SYR4 2014–2017
Fluoride
1075 µg/L 27%
of the EPA limit 4000 µg/L
worst single sample: 1200 µg/L
26/26 SYR4 2012–2019
Dibromoacetic Acid
1.4 µg/L
No EPA limit set
worst single sample: 1.5 µg/L
24/145 SYR4 2012–2019
Lead
0.0080 mg/L 53%
of the EPA limit 0.0150 mg/L
 22/22 LCR 2025
Nitrate
600 µg/L 6%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Barium
21 µg/L 1.1%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Monochloroacetic Acid
4 µg/L
No EPA limit set
 5/145 SYR4 2012–2019
Nitrate-Nitrite
395 µg/L 4%
of the EPA limit 10000 µg/L
worst single sample: 400 µg/L
2/2 SYR4 2012–2018
Chromium
0.9000 µg/L 0.9%
of the EPA limit 100 µg/L
 1/9 SYR4 2012–2019
Combined Radium (-226 And -228)
0.9900 pCi/L 20%
of the EPA limit 5 pCi/L
 1/1 SYR4 2014
89 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 TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
STOWE, LUKE
Phone
847-448-8177
Email
[email protected]

Frequently asked questions about Evanston

Is Evanston tap water safe to drink?

EPA monitoring detected 19 contaminants in Evanston'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 Evanston's water?

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

How many people does Evanston serve?

Evanston reports serving 74,486 people in Illinois, per its EPA record.

Has Evanston had any water quality violations?

The EPA has 99 violations on file for Evanston, 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.