How much nitrate is in Westerville water?

The maximum detected level of nitrate in Westerville water is 6.3 ppb. The EPA limit is 10 mg/L (as nitrogen). See the ZIP code table above for area-specific levels.

Detected Nitrate

Nitrate in Westerville, OH Drinking Water

Q: Is nitrate in Westerville water safe?

Nitrate was detected in Westerville water at 6.3 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 Westerville, Ohio · 98,113 residents · 3 ZIP codes

ZipCheckup's reading of Nitrate in Westerville, Ohio: the highest detected level is 6.3 ppb; the EPA limit is 10 mg/L (as nitrogen). Nitrate carries a high health-risk designation.

Over the past reporting period, water systems in Westerville, Ohio have recorded Nitrate at detectable concentrations in EPA compliance samples.

6.3 ppb

Max Level Detected

6.3 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 Westerville Tap Water

Nitrate has been detected in Westerville, Ohio drinking water at a maximum level of 6.3 ppm — below the EPA MCL of 10 mg/L (as nitrogen).

This analysis covers 98,113 residents across 3 ZIP codes in Westerville.

Westerville's overall water quality grade is C (64/100).

Is Nitrate in Westerville Water Safe?

Nitrate was detected in Westerville 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
43082	6.3 ppm	10 mg/L (as nitrogen)	OK

Average nitrate level across Westerville: 6.3 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 Westerville 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 → Ohio → Westerville

How to cite this page

APA

ZipCheckup. (2026). Nitrate in Westerville, OH Drinking Water. https://zipcheckup.com/contaminants/nitrates/westerville-oh/

BibTeX

@misc{zipcheckup-contaminants-nitrates-westerville-oh,
  author = {{ZipCheckup}},
  title  = {{Nitrate in Westerville, OH Drinking Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/nitrates/westerville-oh/}
}

Data as of July 2026.