How much nitrate is in Hannibal water?

The maximum detected level of nitrate in Hannibal water is 6.972 ppb. The EPA limit is 10 mg/L (as nitrogen). See the ZIP code table above for area-specific levels.

Detected Nitrate

Nitrate in Hannibal, MO Drinking Water

Q: Is nitrate in Hannibal water safe?

Nitrate was detected in Hannibal water at 6.972 ppb, below the EPA limit of 10 mg/L (as nitrogen). Check ZIP-level data on this page for your specific area.

Nitrate data for Hannibal, Missouri · 21,125 residents · 1 ZIP code

ZipCheckup's reading of Nitrate in Hannibal, Missouri: the highest detected level is 6.972 ppb; the EPA limit is 10 mg/L (as nitrogen). Nitrate carries a high health-risk designation.

For residents of Hannibal, Missouri, Nitrate has appeared in public water supply sampling data.

6.972 ppb

Max Level Detected

6.97 ppb

Average Level

10 mg/L (as nitrogen)

EPA MCL

High

Health Risk

Reverse Osmosis or Ion Exchange

Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13

Nitrate in Hannibal Tap Water

Nitrate has been detected in Hannibal, Missouri drinking water at a maximum level of 6.972 ppm — below the EPA MCL of 10 mg/L (as nitrogen).

This analysis covers 21,125 residents across 1 ZIP code in Hannibal.

Hannibal's overall water quality grade is C (59/100).

Is Nitrate in Hannibal Water Safe?

Nitrate was detected in Hannibal water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.

If you are concerned, a reverse osmosis or ion exchange filter can reduce nitrate levels further.

Nitrate Levels by ZIP Code

ZIP Code	Nitrate Level	EPA Limit	Status
63401	6.972 ppm	10 mg/L (as nitrogen)	OK

Average nitrate level across Hannibal: 6.97 ppb

Health Effects of Nitrate

Methemoglobinemia ("blue baby syndrome") in infants under 6 months
Increased risk of colorectal and bladder cancer (long-term)
Thyroid disease from chronic exposure
Possible reproductive effects

Health risk severity: High. Governed by the National Primary Drinking Water Regulations.

How Nitrate Gets Into Drinking Water

Agricultural fertilizer runoff
Animal feedlot operations and manure
Septic system leachate
Urban stormwater and wastewater discharge

What to Do About Nitrate in Hannibal Water

Reverse osmosis is the most effective method for nitrate removal
Ion exchange systems designed for nitrate can also work
Standard carbon filters do NOT remove nitrate
Boiling water increases nitrate concentration — never boil for nitrate

Look for filters certified under NSF 53 / NSF 58 for nitrate removal.

Home → Contaminants → Nitrate → Missouri → Hannibal

How to cite this page

APA ZipCheckup. (2026). Nitrate in Hannibal, MO Drinking Water. https://zipcheckup.com/contaminants/nitrates/hannibal-mo/

BibTeX

@misc{zipcheckup-contaminants-nitrates-hannibal-mo,
  author = {{ZipCheckup}},
  title  = {{Nitrate in Hannibal, MO Drinking Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/nitrates/hannibal-mo/}
}

Data as of July 2026.