Nitrate in Del Rio, TX Drinking Water
Nitrate data for Del Rio, Texas · 37,985 residents · 4 ZIP codes
Across Del Rio, Texas, federal monitoring data has captured Nitrate in water samples at detectable concentrations in the most recent available reporting cycle.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Nitrate in Del Rio Tap Water
Del Rio, Texas has 52 EPA violations related to nitrate in drinking water.
This analysis covers 37,985 residents across 4 ZIP codes in Del Rio.
Del Rio's overall water quality grade is A (88/100).
Is Nitrate in Del Rio 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 Del Rio
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2024-07-01 | Nitrate (Resolved) | Resolved | 78840 |
| 2024-07-01 | Nitrate (Resolved) | Resolved | 78841 |
| 2024-07-01 | Nitrate (Resolved) | Resolved | 78842 |
| 2024-07-01 | Nitrate (Resolved) | Resolved | 78847 |
| 2024-04-01 | Nitrate (Resolved) | Resolved | 78840 |
| 2024-04-01 | Nitrate (Resolved) | Resolved | 78841 |
| 2024-04-01 | Nitrate (Resolved) | Resolved | 78842 |
| 2024-04-01 | Nitrate (Resolved) | Resolved | 78847 |
| 2024-01-01 | Nitrate (Known) | Known | 78840 |
| 2024-01-01 | Nitrate (Known) | Known | 78841 |
| 2024-01-01 | Nitrate (Known) | Known | 78842 |
| 2024-01-01 | Nitrate (Known) | Known | 78847 |
| 2023-07-01 | Nitrate (Known) | Known | 78840 |
| 2023-07-01 | Nitrate (Known) | Known | 78841 |
| 2023-07-01 | Nitrate (Known) | Known | 78842 |
| 2023-07-01 | Nitrate (Known) | Known | 78847 |
| 2023-04-01 | Nitrate (Known) | Known | 78840 |
| 2023-04-01 | Nitrate (Known) | Known | 78841 |
| 2023-04-01 | Nitrate (Known) | Known | 78842 |
| 2023-04-01 | Nitrate (Known) | Known | 78847 |
| ... | 32 more violations |
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 Del Rio 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.