Nitrate in Sussex, WI Drinking Water
Nitrate data for Sussex, Wisconsin · 20,202 residents · 1 ZIP code
Nitrate exposure in drinking water is tracked by EPA across the country; households in Sussex, Wisconsin are among those with confirmed detections in the public water record.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-06-04
Nitrate in Sussex Tap Water
Sussex, Wisconsin has 8 EPA violations related to nitrate in drinking water.
This analysis covers 20,202 residents across 1 ZIP code in Sussex.
Sussex's overall water quality grade is C (66/100).
Is Nitrate in Sussex 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 Sussex
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2025-04-01 | Nitrate (Known) | Known | 53089 |
| 2025-01-01 | Nitrate (Known) | Known | 53089 |
| 2024-07-01 | Nitrate (Known) | Known | 53089 |
| 2024-04-01 | Nitrate (Known) | Known | 53089 |
| 2024-01-01 | Nitrate (Known) | Known | 53089 |
| 2023-10-01 | Nitrate (Known) | Known | 53089 |
| 2023-07-01 | Nitrate (Known) | Known | 53089 |
| 2023-04-01 | Nitrate (Known) | Known | 53089 |
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 Sussex 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.