Is Nokomis Tap Water Safe? Quality Report

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

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
MCL	Health-based	Resolved	1996-10-01 → 1996-12-31
MCL	Health-based	Resolved	1996-10-01 → 1996-12-31
MCL	Health-based	Resolved	1996-10-01 → 1996-12-31
MCL	Health-based	Resolved	1996-07-01 → 1996-09-30
MCL	Health-based	Resolved	1996-07-01 → 1996-09-30
MCL	Health-based	Resolved	1996-07-01 → 1996-09-30
MCL	Health-based	Resolved	1996-04-01 → 1996-06-30
MCL	Health-based	Resolved	1996-04-01 → 1996-06-30
MCL	Health-based	Resolved	1996-04-01 → 1996-06-30
MCL	Health-based	Resolved	1996-04-01 → 1996-06-30

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	254 µg/L 20% of the EPA limit 1300 µg/L worst single sample: 360 µg/L	30/30	SYR4	2013–2019
cis-1,2-Dichloroethylene	30.5 µg/L 44% of the EPA limit 70 µg/L worst single sample: 36 µg/L	26/75	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	17/17	LCR	2026
Nitrate	1400 µg/L 14% of the EPA limit 10000 µg/L	14/16	SYR4	2012–2019
Vinyl Chloride	19.4 µg/L 970% of the EPA limit, at the 95th percentile of samples — 2 µg/L worst single sample: 26 µg/L	13/75	SYR4	2012–2019
trans-1,2-Dichloroethylene	18.6 µg/L 19% of the EPA limit 100 µg/L worst single sample: 21 µg/L	13/75	SYR4	2012–2019
Benzene	5.2 µg/L 104% of the EPA limit, at the 95th percentile of samples — 5 µg/L worst single sample: 5.6 µg/L	9/75	SYR4	2012–2019
Bromodichloromethane	16.652 µg/L No EPA limit set worst single sample: 17.3 µg/L	9/9	SYR4	2014–2019
Bromoform	7.87 µg/L No EPA limit set worst single sample: 9.25 µg/L	9/9	SYR4	2014–2019
Chloroform	11.888 µg/L No EPA limit set worst single sample: 12.48 µg/L	9/9	SYR4	2014–2019
Dibromochloromethane	18 µg/L No EPA limit set worst single sample: 19 µg/L	9/9	SYR4	2014–2019
TTHM	51.8 µg/L 65% of the EPA limit 80 µg/L worst single sample: 53 µg/L	9/9	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	9.409 µg/L 16% of the EPA limit 60 µg/L worst single sample: 10.13 µg/L	8/9	SYR4	2014–2019
Dibromoacetic Acid	4.779 µg/L No EPA limit set worst single sample: 5.04 µg/L	7/9	SYR4	2014–2019
Lead	3.325 µg/L 22% of the EPA limit 15 µg/L worst single sample: 3.8 µg/L	6/30	SYR4	2013–2019
Trichloroacetic Acid	2.95 µg/L No EPA limit set worst single sample: 3.03 µg/L	5/9	SYR4	2014–2019
Barium	64.1 µg/L 3.2% of the EPA limit 2000 µg/L worst single sample: 68 µg/L	3/3	SYR4	2012–2018
Fluoride	1044.4 µg/L 26% of the EPA limit 4000 µg/L worst single sample: 1050 µg/L	3/3	SYR4	2012–2018
Dichloroacetic Acid	3.211 µg/L No EPA limit set worst single sample: 3.27 µg/L	2/9	SYR4	2014–2019
Trichloroethylene	2.117 µg/L 42% of the EPA limit 5 µg/L worst single sample: 2.2 µg/L	2/75	SYR4	2012–2019
Arsenic	2.3 µg/L 23% of the EPA limit 10 µg/L	1/3	SYR4	2012–2018
Chromium	6.1 µg/L 6.1% of the EPA limit 100 µg/L	1/3	SYR4	2012–2018
Combined Radium (-226 And -228)	0.9370 pCi/L 19% of the EPA limit 5 pCi/L	1/1	SYR4	2015
Monobromoacetic Acid	1.17 µg/L No EPA limit set	1/9	SYR4	2014–2019
Tetrachloroethylene	1.3 µg/L 26% of the EPA limit 5 µg/L	1/75	SYR4	2012–2019
Toluene	1.6 µg/L 0.2% of the EPA limit 1000 µg/L	1/75	SYR4	2012–2019

52 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneXylenes, TotalO-DichlorobenzeneP-Dichlorobenzene

Utility contact

Contact: ARKEBAUR, SCOTT
Phone: 217-563-2514
Email: [email protected]

Frequently asked questions about Nokomis

Is Nokomis tap water safe to drink?

EPA monitoring detected 26 contaminants in Nokomis'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 Nokomis's water?

EPA monitoring detected Copper, cis-1,2-Dichloroethylene, Lead, Nitrate, Vinyl Chloride, and others. The full list with the level and data source for each is above.

How many people does Nokomis serve?

Nokomis reports serving 2,370 people in Illinois, per its EPA record.

Has Nokomis had any water quality violations?

The EPA has 37 violations on file for Nokomis, of which 30 are health-based (a contaminant limit or required treatment was breached) and 2 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.