Is Southmayd, TX Tap Water Safe to Drink?
Graded C+, with 29 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
67/100
waterverge.com Southmayd, TX — Water Quality Report
Southmayd's drinking water received a grade of C+ (67 out of 100), indicating fair water quality. The city's 2 water systems serve approximately 1,254 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 48 violations on record, including 6 health-based violations. 29 remain unresolved.
What to know about Southmayd's water
Southmayd ranks #625 out of 1067 cities in Texas for water quality, placing it below average in the state.
Southmayd 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, Southmayd may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 17 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Southmayd, TX water safe to drink?
Southmayd's drinking water has significant quality concerns based on EPA testing data. With a grade of C+ (67/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 1,254 residents using groundwater (wells).
Recent water quality updates for Southmayd
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Southmayd's water quality assessment. Grade: C+ (67/100).
Contaminants: Lead and Copper Rule.
Contaminants: Consumer Confidence Rule.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-3294). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-1606). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Southmayd's water supply.
Well within EPA limits.
Violation history
Southmayd's water system has 48 total violations on record, including 6 health-based violations. 29 remain unresolved. 17 violations were issued in the last 5 years.
Flood & environmental risk
Grayson County has experienced 2 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 Range Ck Nr Collinsville.
Where does Southmayd's water come from?
Southmayd's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 1,254 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Range Ck Nr Collinsville (river).
What Southmayd residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Southmayd'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.
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 Southmayd
Industrial polluters nearby
Reported releases to surface water by facilities near Southmayd, ranked by pounds discharged annually.
Total reported releases to surface water: 2 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
DENISON INDUSTRIES DENISON, TX75020 | Copper | 1 | 6.8 mi |
KAISER ALUMINUM FABRICATED PRODUCTS LLC SHERMAN, TX75090 | Lead | 0 | 7.4 mi |
EATON CORP. SHERMAN, TX75090 | — | — | 8.8 mi |
TEXAS INSTRUMENTS SHERMAN, TX75090 | — | — | 7.7 mi |
FINISAR CORP SHERMAN, TX75090 | — | — | 7.8 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D1 — moderate droughtGrayson 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
Grayson County has experienced 2 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 Southmayd compares by contaminant
Explore where Southmayd ranks among all Texas cities for specific contaminants.
Water source & infrastructure
Where Southmayd's water comes from
Southmayd'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 1,254 people through 2 water systems.
Water bodies near Southmayd
Southmayd is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Southmayd
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CITY OF SOUTHMAYD WESTVIEW SUBDIVISION | TX0910048 | 738 | GW |
| CITY OF SOUTHMAYD | TX0910045 | 516 | GW |
How Southmayd compares
Full Texas rankings →Southmayd's score of 67/100 is above the average of 46/100 among major Texas cities. It outscores 8 of 10 nearby cities.
Nearby cities
View Texas rankings →About Southmayd, TX
Wikipedia →Southmayd is a city in Grayson County, Texas, United States. The population was 978 at the 2020 census. It is part of the Sherman–Denison Metropolitan Statistical Area.
Learn more about your water
Guides and resources related to Southmayd's water quality findings.
Explore water quality across Grayson
Frequently asked questions
Is Southmayd, TX tap water safe to drink?
Southmayd's water quality earned a grade of C+ (67/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #625 out of 1067 cities tested in Texas.
What contaminants are in Southmayd's water?
Lead was measured at 0.0 ppb (90th percentile). 48 violations are on record.
How is Southmayd'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 Southmayd?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Southmayd's water come from?
Southmayd's water is sourced from Groundwater. The city has 2 water systems serving approximately 1,254 residents.
What health violations has Southmayd's water system had?
Southmayd has 6 health-based violations on record. The most recent violation was recorded in December 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 29 violations remain unresolved.
Is Southmayd's groundwater at risk of contamination?
Southmayd 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 48 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 Southmayd's water compare to other cities?
Southmayd ranks #625 out of 1067 cities in Texas (better than 41% of state cities) and #11294 out of 15744 cities nationally (28th percentile). The grade of C+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.