Is Wallis, TX Tap Water Safe to Drink?
Graded B-, with 15 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
74/100
waterverge.com Wallis, TX — Water Quality Report
Wallis's drinking water received a grade of B- (74 out of 100), indicating fair water quality. The city's 2 water systems serve approximately 1,352 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 27 violations on record, including 3 health-based violations. 15 remain unresolved.
What to know about Wallis's water
Wallis ranks #514 out of 1067 cities in Texas for water quality, placing it mid-range in the state.
Wallis relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Wallis may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 7 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Wallis, TX water safe to drink?
Wallis's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (74/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 1,352 residents using groundwater (wells).
Recent water quality updates for Wallis
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Wallis's water quality assessment. Grade: B- (74/100).
Contaminants: Consumer Confidence Rule.
Contaminants: Public Notice.
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Federal disaster declaration (FEMA DR-4798). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4781). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Wallis's water supply.
Well within EPA limits.
Violation history
Wallis's water system has 27 total violations on record, including 3 health-based violations. 15 remain unresolved. 7 violations were issued in the last 5 years.
Flood & environmental risk
Austin County has experienced 9 federally declared disasters since 2005. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Little Bernard Ck At I-10 Nr Sealy.
Where does Wallis's water come from?
Wallis's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 1,352 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Little Bernard Ck At I-10 Nr Sealy (river).
What Wallis residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Wallis's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Wallis's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Wallis
Industrial polluters nearby
Reported releases to surface water by facilities near Wallis, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
SIKA SEALY TEXAS SEALY, TX77474 | — | — | 9.8 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D1 — moderate droughtAustin County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Austin County has experienced 9 federally declared disasters since 2005. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Wallis compares by contaminant
Explore where Wallis ranks among all Texas cities for specific contaminants.
Water source & infrastructure
Where Wallis's water comes from
Wallis's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 1,352 people through 2 water systems.
Water bodies near Wallis
Wallis is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Wallis
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CITY OF WALLIS | TX0080015 | 1,292 | GW |
| SK MOBILE HOME PARK | TX0080028 | 60 | GW |
How Wallis compares
Full Texas rankings →Wallis's score of 74/100 is above the average of 46/100 among major Texas cities. It outscores 8 of 10 nearby cities.
Nearby cities
View Texas rankings →About Wallis, TX
Wikipedia →Wallis is a city in far southeastern Austin County, Texas, United States. The city is located along State Highway 36 (SH 36) and the BNSF Railway between Rosenberg and Sealy. The city's population was 1,292 at the 2020 census.
Learn more about your water
Guides and resources related to Wallis's water quality findings.
Explore water quality across Austin
Frequently asked questions
Is Wallis, TX tap water safe to drink?
Wallis's water quality earned a grade of B- (74/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #514 out of 1067 cities tested in Texas.
What contaminants are in Wallis's water?
Lead was measured at 0.0 ppb (90th percentile). 27 violations are on record.
How is Wallis's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Wallis?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Wallis's water come from?
Wallis's water is sourced from Groundwater. The city has 2 water systems serving approximately 1,352 residents.
What health violations has Wallis's water system had?
Wallis has 3 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 15 violations remain unresolved.
Is Wallis's groundwater at risk of contamination?
Wallis uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 27 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Wallis's water compare to other cities?
Wallis ranks #514 out of 1067 cities in Texas (better than 52% of state cities) and #9964 out of 15744 cities nationally (37th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.