Is Coal Valley Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Rock Island

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	2016-07-01 → 2016-09-30
MCL	Health-based	Resolved	2016-07-01 → 2016-09-30
MCL	Health-based	Resolved	2016-07-01 → 2016-09-30
MCL	Health-based	Resolved	2016-07-01 → 2016-09-30
MCL	Health-based	Resolved	2016-07-01 → 2016-09-30
TT	Health-based	Resolved	1992-12-07
Other	Monitoring	Resolved	2024-07-01
Other	Monitoring	Resolved	2024-07-01
MR	Monitoring	Resolved	2023-10-01 → 2023-12-31
MR	Monitoring	Resolved	2023-10-01 → 2023-12-31

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	1138 µg/L 88% of the EPA limit 1300 µg/L worst single sample: 4350 µg/L	109/123	SYR4	2014–2018
Lead	0.0083 mg/L 55% of the EPA limit 0.0150 mg/L	20/20	LCR	2025
Chloroform	15.24 µg/L No EPA limit set worst single sample: 18.6 µg/L	8/8	SYR4	2013–2019
TTHM	23.43 µg/L 29% of the EPA limit 80 µg/L worst single sample: 31.2 µg/L	8/8	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	14.75 µg/L 25% of the EPA limit 60 µg/L worst single sample: 18.6 µg/L	8/8	SYR4	2013–2019
Barium	357.4 µg/L 18% of the EPA limit 2000 µg/L worst single sample: 358 µg/L	7/7	SYR4	2012–2018
Dichloroacetic Acid	7.58 µg/L No EPA limit set worst single sample: 8.3 µg/L	7/8	SYR4	2013–2019
Fluoride	1141 µg/L 29% of the EPA limit 4000 µg/L worst single sample: 1150 µg/L	7/7	SYR4	2012–2018
Lead	6.6375 µg/L 44% of the EPA limit 15 µg/L worst single sample: 6.68 µg/L	6/123	SYR4	2014–2018
Trichloroacetic Acid	8.15 µg/L No EPA limit set worst single sample: 10.3 µg/L	6/8	SYR4	2013–2019
Xylenes, Total	2.2325 µg/L 0% of the EPA limit 10000 µg/L worst single sample: 2.52 µg/L	6/27	SYR4	2012–2019
Lithium	46 µg/L No EPA limit set	6/6	UCMR-5	2023
Combined Radium (-226 And -228)	4.04 pCi/L 81% of the EPA limit 5 pCi/L worst single sample: 4.1 pCi/L	5/5	SYR4	2014–2018
Nitrate	420 µg/L 4.2% of the EPA limit 10000 µg/L	4/72	SYR4	2012–2019
Nitrate-Nitrite	2542.6 µg/L 25% of the EPA limit 10000 µg/L worst single sample: 2810 µg/L	3/36	SYR4	2012–2019
Bromodichloromethane	8.8 µg/L No EPA limit set	1/8	SYR4	2013–2019
Carbon Tetrachloride	1.8 µg/L 36% of the EPA limit 5 µg/L	1/27	SYR4	2012–2019
Dibromochloromethane	3.8 µg/L No EPA limit set	1/8	SYR4	2013–2019
Nitrite	2390 µg/L 239% of the EPA limit, at the 95th percentile of samples — 1000 µg/L	1/36	SYR4	2012–2019
Toluene	1.3 µg/L 0.1% of the EPA limit 1000 µg/L	1/27	SYR4	2012–2019

88 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, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MULLEN, PENNY
Phone: 309-799-3604
Email: [email protected]

Frequently asked questions about Coal Valley

Is Coal Valley tap water safe to drink?

EPA monitoring detected 20 contaminants in Coal Valley'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 Coal Valley's water?

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

How many people does Coal Valley serve?

Coal Valley reports serving 3,873 people in Illinois, per its EPA record.

Has Coal Valley had any water quality violations?

The EPA has 17 violations on file for Coal Valley, of which 6 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.