Nitrate · Indiana

Nitrate in Indiana Drinking Water — 18 ZIPs Tested

EPA data analysis for nitrate in Indiana drinking water systems

ZipCheckup tracks Nitrate in Indiana drinking water: 18 ZIP codes with detected levels on record. No ZIP codes exceed the EPA limit on record. Nitrate carries a high health-risk designation.

18
ZIPs with Detections
0
ZIPs with Violations
10 mg/L (as nitrogen)
EPA Limit
High
Health Risk
Reverse Osmosis or Ion Exchange
Best Filter Method

Nitrate Contamination in Indiana

ZipCheckup analyzed drinking water data across 980 ZIP codes in Indiana for nitrate contamination. 18 ZIP codes have reported nitrate detections, and 0 have EPA violations on record.

EPA Standard for Nitrate

The EPA maximum contaminant level (MCL) for nitrate is 10 mg/L (as nitrogen), governed by the National Primary Drinking Water Regulations. Water systems that exceed this limit must take corrective action and notify consumers.

Worst ZIP Codes for Nitrate in Indiana

These ZIP codes reported the highest nitrate levels in Indiana based on CCR reports and EPA data:

Lowest Nitrate Levels in Indiana

These ZIP codes had the lowest reported nitrate detections in Indiana:

Health Effects of Nitrate

How to Remove Nitrate From Drinking Water

The most effective treatment for nitrate removal is Reverse Osmosis or Ion Exchange. Look for filters certified under NSF 53 / NSF 58 standards.

Check Your ZIP Code

Use the ZipCheckup water quality search to see nitrate data for your specific water system in Indiana.

Worst ZIP Codes for Nitrate in Indiana

Ranked by highest nitrate detection level.

Rank ZIP Code City Level Detected EPA Limit Status
1 46530 Granger 6500 ppb 10000 ppb Within Limit
2 46601 South Bend 6500 ppb 10000 ppb Within Limit
3 46604 South Bend 6500 ppb 10000 ppb Within Limit
4 46613 South Bend 6500 ppb 10000 ppb Within Limit
5 46614 South Bend 6500 ppb 10000 ppb Within Limit
6 46615 South Bend 6500 ppb 10000 ppb Within Limit
7 46616 South Bend 6500 ppb 10000 ppb Within Limit
8 46617 South Bend 6500 ppb 10000 ppb Within Limit
9 46619 South Bend 6500 ppb 10000 ppb Within Limit
10 46624 South Bend 6500 ppb 10000 ppb Within Limit
11 46626 South Bend 6500 ppb 10000 ppb Within Limit
12 46628 South Bend 6500 ppb 10000 ppb Within Limit
13 46634 South Bend 6500 ppb 10000 ppb Within Limit
14 46635 South Bend 6500 ppb 10000 ppb Within Limit
15 46637 South Bend 6500 ppb 10000 ppb Within Limit
16 46660 South Bend 6500 ppb 10000 ppb Within Limit
17 46680 South Bend 6500 ppb 10000 ppb Within Limit
18 46699 South Bend 6500 ppb 10000 ppb Within Limit

Lowest Nitrate Levels in Indiana

ZIP Code City Level Detected
46699 South Bend 6500 ppb
46680 South Bend 6500 ppb
46660 South Bend 6500 ppb
46637 South Bend 6500 ppb
46635 South Bend 6500 ppb
46634 South Bend 6500 ppb
46628 South Bend 6500 ppb
46626 South Bend 6500 ppb
46624 South Bend 6500 ppb
46619 South Bend 6500 ppb

Cities with Nitrate Data in Indiana

2 cities in Indiana have nitrate testing data available.

Indiana Water Quality Overview: See statewide water quality rankings on the Indiana water quality page.
Learn more about Nitrate: Read the full guide on Nitrate in drinking water.
Home → Contaminants → Nitrate → Indiana

How to cite this page

APA ZipCheckup. (2026). Nitrate in Indiana Drinking Water — 18 ZIPs Tested. https://zipcheckup.com/contaminants/nitrates/indiana/
BibTeX 
@misc{zipcheckup-contaminants-nitrates-indiana,
  author = {{ZipCheckup}},
  title  = {{Nitrate in Indiana Drinking Water — 18 ZIPs Tested}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/nitrates/indiana/}
}

Data as of July 2026.

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