Nitrate in Saint Paul, MN Drinking Water
Nitrate data for Saint Paul, Minnesota · 817,295 residents · 42 ZIP codes
For residents of Saint Paul, Minnesota, Nitrate has appeared in public water supply sampling data.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-06-04
Nitrate in Saint Paul Tap Water
Saint Paul, Minnesota has 20 EPA violations related to nitrate in drinking water.
This analysis covers 817,295 residents across 42 ZIP codes in Saint Paul.
Saint Paul's overall water quality grade is D (54/100).
Is Nitrate in Saint Paul Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis or ion exchange filter certified under NSF 53 / NSF 58 and testing your water independently.
EPA Violations for Nitrate in Saint Paul
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2025-10-01 | Nitrate (Known) | Known | 55118 |
| 2025-10-01 | Nitrate (Known) | Known | 55120 |
| 2025-10-01 | Nitrate (Known) | Known | 55121 |
| 2025-10-01 | Nitrate (Known) | Known | 55123 |
| 2025-07-01 | Nitrate (Known) | Known | 55118 |
| 2025-07-01 | Nitrate (Known) | Known | 55120 |
| 2025-07-01 | Nitrate (Known) | Known | 55121 |
| 2025-07-01 | Nitrate (Known) | Known | 55123 |
| 2025-04-01 | Nitrate (Known) | Known | 55118 |
| 2025-04-01 | Nitrate (Known) | Known | 55120 |
| 2025-04-01 | Nitrate (Known) | Known | 55121 |
| 2025-04-01 | Nitrate (Known) | Known | 55123 |
| 2025-01-01 | Nitrate (Known) | Known | 55118 |
| 2025-01-01 | Nitrate (Known) | Known | 55120 |
| 2025-01-01 | Nitrate (Known) | Known | 55121 |
| 2025-01-01 | Nitrate (Known) | Known | 55123 |
| 2024-10-01 | Nitrate (Known) | Known | 55118 |
| 2024-10-01 | Nitrate (Known) | Known | 55120 |
| 2024-10-01 | Nitrate (Known) | Known | 55121 |
| 2024-10-01 | Nitrate (Known) | Known | 55123 |
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 Saint Paul 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.