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Tap water quality report

Hannibal, MO

EPA monitoring detected 22 contaminants across the 1 water supplier serving Hannibal. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
17,108
people served
22
contaminants found
Missouri rankings Lead in Missouri PFAS in Missouri

What was found in Hannibal's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
6268.499999999999 µg/L 63%
of the EPA limit 10000 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Fluoride
1193 µg/L 30%
of the EPA limit 4000 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Copper
254.34999999999957 µg/L 20%
of the EPA limit 1300 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
TTHM
164.49999999999991 µg/L 206%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Chloroform
110.25 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
76.06999999999998 µg/L 127%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Barium
72.81 µg/L 3.6%
of the EPA limit 2000 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Bromodichloromethane
41.2 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Dichloroacetic Acid
35.455 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Trichloroacetic Acid
30.075 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Dibromochloromethane
26.7 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Monobromoacetic Acid
20.64 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Monochloroacetic Acid
14.395 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Bromoform
11.274999999999999 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Dibromoacetic Acid
10.025999999999998 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Lead
6.465 µg/L 43%
of the EPA limit 15 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Chromium
2.6849999999999996 µg/L 2.7%
of the EPA limit 100 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Atrazine
2.3659999999999997 µg/L 79%
of the EPA limit 3 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Arsenic
1.06 µg/L 11%
of the EPA limit 10 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Simazine
0.3000 µg/L 7.5%
of the EPA limit 4 µg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2019
1/1 SYR4
Pfba
0.0124 µg/L
No EPA limit set
Main supplier: HANNIBAL PWS · 17,108 people · 2024
1/1 UCMR-5
Lead
0.0053 mg/L 35%
of the EPA limit 0.0150 mg/L
Main supplier: HANNIBAL PWS · 17,108 people · 2024
1/1 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Hannibal

SupplierPopulation served
HANNIBAL PWS 17,108

Frequently asked questions about Hannibal tap water

Is Hannibal tap water safe to drink?

EPA testing detected 22 contaminants in the water serving Hannibal. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Hannibal?

1 public water supplier report drinking-water monitoring for Hannibal, Missouri to the EPA. Each is listed above with its population served.

What contaminants are in Hannibal's water?

The contaminants EPA monitoring detected in Hannibal include Nitrate-Nitrite, Fluoride, Copper, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.

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.