Is Decatur Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Macon

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	2002-04-01 → 2002-06-30
MCL	Health-based	Resolved	2002-04-01 → 2002-06-30
MCL	Health-based	Resolved	2002-04-01 → 2002-06-30
MCL	Health-based	Resolved	2002-01-01 → 2002-03-31
MCL	Health-based	Resolved	2002-01-01 → 2002-03-31
MCL	Health-based	Resolved	2002-01-01 → 2002-03-31
MCL	Health-based	Resolved	2001-04-01 → 2001-06-30
MCL	Health-based	Resolved	2001-04-01 → 2001-06-30
MCL	Health-based	Resolved	2001-04-01 → 2001-06-30
MCL	Health-based	Resolved	2001-01-01 → 2001-03-31

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
Bromodichloromethane	13.1715 µg/L No EPA limit set worst single sample: 16 µg/L	244/244	SYR4	2012–2019
Chloroform	60.844 µg/L No EPA limit set worst single sample: 95 µg/L	244/244	SYR4	2012–2019
Dibromochloromethane	5.996 µg/L No EPA limit set worst single sample: 6.467 µg/L	244/244	SYR4	2012–2019
TTHM	76.725 µg/L 96% of the EPA limit 80 µg/L worst single sample: 115 µg/L	244/244	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	19.91 µg/L 33% of the EPA limit 60 µg/L worst single sample: 32 µg/L	243/244	SYR4	2012–2019
Dichloroacetic Acid	15.3 µg/L No EPA limit set worst single sample: 27 µg/L	221/244	SYR4	2012–2019
Trichloroacetic Acid	5.8155 µg/L No EPA limit set worst single sample: 8.24 µg/L	190/244	SYR4	2012–2019
Dibromoacetic Acid	2.155 µg/L No EPA limit set worst single sample: 2.51 µg/L	110/244	SYR4	2012–2019
Chlorite	482.5 µg/L 48% of the EPA limit 1000 µg/L worst single sample: 530 µg/L	96/96	SYR4	2012–2019
Nitrate	7900 µg/L 79% of the EPA limit 10000 µg/L worst single sample: 8600 µg/L	58/64	SYR4	2012–2019
Copper	45.975 µg/L 3.5% of the EPA limit 1300 µg/L worst single sample: 71 µg/L	38/60	SYR4	2014–2017
Bromoform	1.88468 µg/L No EPA limit set worst single sample: 3.463 µg/L	33/244	SYR4	2012–2019
Lead	0.0026 mg/L 17% of the EPA limit 0.0150 mg/L	19/19	LCR	2025
Fluoride	1133.5 µg/L 28% of the EPA limit 4000 µg/L worst single sample: 1210 µg/L	10/10	SYR4	2012–2019
Monobromoacetic Acid	4.527 µg/L No EPA limit set worst single sample: 4.59 µg/L	10/244	SYR4	2012–2019
Lead	7.2 µg/L 48% of the EPA limit 15 µg/L worst single sample: 7.4 µg/L	9/60	SYR4	2014–2017
Barium	20.4 µg/L 1% of the EPA limit 2000 µg/L worst single sample: 26 µg/L	8/8	SYR4	2012–2019
Monochloroacetic Acid	4.2275 µg/L No EPA limit set worst single sample: 4.88 µg/L	6/244	SYR4	2012–2019
Nitrate-Nitrite	6619 µg/L 66% of the EPA limit 10000 µg/L worst single sample: 6700 µg/L	3/3	SYR4	2012–2018
Arsenic	1.58 µg/L 16% of the EPA limit 10 µg/L worst single sample: 1.6 µg/L	2/8	SYR4	2012–2019
Atrazine	0.4000 µg/L 13% of the EPA limit 3 µg/L	1/19	SYR4	2012–2019
Selenium	6.5 µg/L 13% of the EPA limit 50 µg/L	1/8	SYR4	2012–2019

86 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, TotalBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(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: WEIL, ROBERT C.
Phone: 217-424-2863
Email: [email protected]

Frequently asked questions about Decatur

Is Decatur tap water safe to drink?

EPA monitoring detected 22 contaminants in Decatur'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 Decatur'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 Decatur serve?

Decatur reports serving 76,122 people in Illinois, per its EPA record.

Has Decatur had any water quality violations?

The EPA has 98 violations on file for Decatur, of which 93 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.