Is Tap Water Safe to Drink in Corpus Christi?
Tap water in Corpus Christi currently meets EPA standards and is safe to drink day to day, but the city's track record includes repeated boil-water notices and a 2016 industrial contamination scare, so it's fair to stay aware of city advisories.
Water Source
Corpus Christi Water draws from the Nueces River system (Lake Corpus Christi and Choke Canyon Reservoir), Lake Texana via the Mary Rhodes Pipeline, and Colorado River (Texas) supplies, treated at the O.N. Stevens Water Treatment Plant.
EPA Compliance Status
Meets federal Safe Drinking Water Act standards, but the system's history includes several citywide boil-water notices in the 2010s for low chlorine residuals, and a December 2016 'do not use' order after the Indulin AA-86 asphalt-emulsifier back-flow incident in the industrial district. The city has since invested in plant and distribution upgrades, and regional drought has pushed development of seawater desalination.
Notable Contaminants & Context
- •The 2016 back-flow incident involving an asphalt emulsifier led to a brief citywide do-not-use order and remains the defining event in local water confidence
- •Low chlorine residual episodes in the distribution system triggered multiple precautionary boil notices in the 2010s
- •The heavy industrial corridor along the ship channel keeps back-flow prevention and cross-connection control a live oversight issue
- •Disinfection byproducts from warm reservoir water are monitored and within limits
Water Quality Data
Key contaminants detected vs. regulatory limits. All values from the most recent published report — Source: Corpus Christi Water 2024 CCR.
| Contaminant | Detected | Limit | Status |
|---|---|---|---|
| Chlorine (total) | 2.0 mg/L | 4.0 mg/L | ✓ |
| Fluoride | 0.69 mg/L | 4.0 mg/L | ✓ |
| Lead (90th percentile) | 2.8 µg/L | 15.0 µg/L | ✓ |
| Nitrate (as N) | 0.91 mg/L | 10.0 mg/L | ✓ |
| TTHM (Total Trihalomethanes) | 41.7 µg/L | 80.0 µg/L | ✓ |
| HAA5 (Haloacetic Acids) | 29.4 µg/L | 60.0 µg/L | ✓ |
✓ = below limit ⚠ = above health goal ✗ = exceeds guideline
How It Compares
Corpus Christi's finished water quality is comparable to other Texas Gulf systems, but its advisory history sets it apart from consistently quiet systems like Austin or Fort Worth; drought-driven supply stress has also made it Texas's leading candidate for large-scale seawater desalination.
Tips
- •Sign up for the city's alert system so you hear about any boil notice immediately
- •Day to day, the water meets standards and is fine to drink
- •Keeping a few gallons of stored water is sensible given the advisory history and hurricane exposure
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality