Nitrate in Nampa, ID Drinking Water
Nitrate data for Nampa, Idaho · 136,828 residents · 5 ZIP codes
Water quality records for Nampa, Idaho show Nitrate detections on file — a finding that places it among the contaminants worth tracking for this area.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-06-04
Nitrate in Nampa Tap Water
Nampa, Idaho has 1 EPA violation related to nitrate in drinking water.
This analysis covers 136,828 residents across 5 ZIP codes in Nampa.
Nampa's overall water quality grade is B (77/100).
Is Nitrate in Nampa 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 Nampa
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2023-07-01 | Nitrate (Known) | Known | 83687 |
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 Nampa 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.