Is Hannibal Tap Water Safe? Quality Report

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

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

174

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	2023-08-01 → 2023-08-31
MCL	Health-based	Archived	2023-08-01 → 2023-08-31
MCL	Health-based	Archived	2023-08-01 → 2023-08-31
MCL	Health-based	Archived	2023-08-01 → 2023-08-31
MCL	Health-based	Archived	2023-08-01 → 2023-08-31
MCL	Health-based	Archived	2023-08-01 → 2023-08-31
TT	Health-based	Resolved	2016-10-01 → 2016-10-31
TT	Health-based	Resolved	2016-05-01 → 2016-05-31
TT	Health-based	Resolved	2016-05-01 → 2016-05-31
TT	Health-based	Resolved	2016-05-01 → 2016-05-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfba	0.0124 µg/L	4/4	2024

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	41.2 µg/L No EPA limit set worst single sample: 55 µg/L	136/136	SYR4	2012–2019
Chloroform	110.25 µg/L No EPA limit set worst single sample: 196 µg/L	136/136	SYR4	2012–2019
Dibromochloromethane	26.7 µg/L No EPA limit set worst single sample: 47.2 µg/L	131/136	SYR4	2012–2019
Dichloroacetic Acid	35.455 µg/L No EPA limit set worst single sample: 54.2 µg/L	128/128	SYR4	2012–2019
TTHM	164.5 µg/L 206% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 243 µg/L	128/128	SYR4	2012–2019
Trichloroacetic Acid	30.075 µg/L No EPA limit set worst single sample: 48.2 µg/L	126/128	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	76.07 µg/L 127% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 102 µg/L	119/128	SYR4	2012–2019
Copper	254.35 µg/L 20% of the EPA limit 1300 µg/L worst single sample: 851 µg/L	98/98	SYR4	2012–2019
Lead	6.465 µg/L 43% of the EPA limit 15 µg/L worst single sample: 10.4 µg/L	48/97	SYR4	2012–2019
Dibromoacetic Acid	10.026 µg/L No EPA limit set worst single sample: 13.1 µg/L	45/128	SYR4	2012–2019
Bromoform	11.275 µg/L No EPA limit set worst single sample: 19.6 µg/L	36/136	SYR4	2012–2019
Monobromoacetic Acid	20.64 µg/L No EPA limit set worst single sample: 22.5 µg/L	33/128	SYR4	2012–2019
Nitrate-Nitrite	6268.5 µg/L 63% of the EPA limit 10000 µg/L worst single sample: 6440 µg/L	28/28	SYR4	2012–2019
Lead	0.0053 mg/L 35% of the EPA limit 0.0150 mg/L	25/25	LCR	2024
Barium	72.81 µg/L 3.6% of the EPA limit 2000 µg/L worst single sample: 74.7 µg/L	8/8	SYR4	2012–2019
Fluoride	1193 µg/L 30% of the EPA limit 4000 µg/L worst single sample: 1200 µg/L	8/8	SYR4	2012–2019
Atrazine	2.366 µg/L 79% of the EPA limit 3 µg/L worst single sample: 2.66 µg/L	7/32	SYR4	2012–2019
Chromium	2.685 µg/L 2.7% of the EPA limit 100 µg/L worst single sample: 2.91 µg/L	7/17	SYR4	2012–2019
Monochloroacetic Acid	14.395 µg/L No EPA limit set worst single sample: 14.8 µg/L	4/128	SYR4	2012–2019
Arsenic	1.06 µg/L 11% of the EPA limit 10 µg/L	1/8	SYR4	2012–2019
Simazine	0.3000 µg/L 7.5% of the EPA limit 4 µg/L	1/32	SYR4	2012–2019

76 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-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MUNZLINGER, MATHEW
Phone: 573-221-8050
Email: [email protected]

Frequently asked questions about Hannibal

Is Hannibal tap water safe to drink?

EPA monitoring detected 22 contaminants in Hannibal'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 Hannibal's water?

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

How many people does Hannibal serve?

Hannibal reports serving 17,108 people in Missouri, per its EPA record.

Has Hannibal had any water quality violations?

The EPA has 174 violations on file for Hannibal, of which 96 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.