Recent rainfall across Central Texas has brought welcome relief to our region, helping replenish Canyon Lake and other local water sources. While these improvements are encouraging, they have also raised an understandable question among residents:
If Canyon Lake is full, why are Stage 3 drought restrictions still in place? The answer is that drought-stage decisions are based on water supply conditions and operational triggers, not Canyon Lake levels alone. While lake levels have improved, additional criteria are evaluated to help ensure reliable service across the system.
While Canyon Lake is an important water source for many customers in Comal County, Texas Water Company serves customers through a combination of water sources, including both surface water and groundwater systems. Drought-stage decisions are based on a variety of factors, including water-supply conditions, operational considerations and established drought-management criteria.
Texas Water Company's water rights remain the same regardless of lake levels, and water restrictions are not determined by lake levels alone.
At Texas Water Company (TWC), delivering safe, reliable drinking water requires a complex system of treatment facilities, pumps, storage tanks and distribution infrastructure. Water availability is an important part of that process, but so are water quality, system operations and the ability to reliably move water throughout our service areas.
In this edition of The Water Source, we're taking a closer look at the journey water takes from source to tap, how Texas weather can affect water operations and the investments we are making to support long-term reliability for the communities we serve.
When you turn on your faucet, you expect reliable water to flow. Before that water reaches your home, however, it goes through several important steps.
Canyon Lake serves as a major source of water for many of the communities we serve in Comal County. Other customers receive water from groundwater wells, depending on the area served. Regardless of the source, water must be collected, treated as necessary and distributed through infrastructure before reaching customers.
The journey from source to tap generally includes:
Each step is essential to delivering reliable drinking water. Water availability, treatment capability, storage capacity and system operations all play a role in ensuring customers have dependable service.
Did You Know? A full lake does not automatically mean drought restrictions will change. Water-management decisions are based on multiple factors, including water rights, drought-management criteria, operational conditions and long-term system reliability.
Texas weather is known for its extremes. Prolonged drought, intense summer heat and sudden heavy rainfall can all create challenges for water systems, sometimes in very different ways.
Heavy Rainfall and Flooding
While rainfall helps replenish lakes and reservoirs, significant storms and flooding can also affect the quality of water entering treatment facilities.
As stormwater flows across the landscape, it can carry soil, sediment, organic materials and debris into rivers and lakes. This can increase turbidity, or the cloudiness of water caused by suspended particles.
Higher turbidity can make the treatment process more complex, requiring additional monitoring and operational adjustments to ensure drinking water continues to meet established standards.
The flooding events experienced across our region in July 2025 and again in 2026 demonstrate how severe weather can create challenges that extend beyond the storm itself. Changes in source-water conditions, impacts to infrastructure and ongoing operational needs may require continued attention even after water levels have stabilized.
Extreme Heat and Increased Demand
On the opposite end of the spectrum, prolonged Texas heat can place additional demands on water systems.
During warmer months, customers typically use more water for lawn irrigation, landscaping and other outdoor activities. When many households increase water use at the same time, demand on treatment and distribution systems can rise significantly.
High temperatures can also increase evaporation and reduce the amount of water naturally replenishing local water sources.
Together, these conditions can create additional operational challenges, particularly during periods of peak demand.
How Weather Can Affect Water Service
Water systems are designed to operate under a wide range of conditions, but extreme weather can sometimes contribute to service interruptions or pressure fluctuations.
Severe storms may affect electrical equipment, pumping facilities or access to critical infrastructure. Likewise, periods of high demand can place additional strain on treatment, pumping and storage systems.
These challenges are one reason ongoing infrastructure maintenance, emergency preparedness and long-term planning remain so important.
For customers in Comal County, recent rainfall and improved Canyon Lake levels have understandably prompted questions about continued Stage 3 drought restrictions.
While higher lake levels are encouraging, drought restrictions are not determined by Canyon Lake levels alone.
Texas Water Company's water rights allocation remains the same regardless of lake level, and drought-stage decisions are based on established drought-management criteria, operational triggers, system conditions and long-term water-management considerations.
Drought-stage decisions are based on water-supply conditions, operational considerations and established drought-management criteria designed to support reliable water service. Infrastructure investments remain an important part of our long-term strategy to strengthen system reliability.
Conservation and thoughtful water use remain an important part of that effort.
Thoughtful water use helps manage demand on water systems, supports reliable service during periods of high use and helps protect water resources for future generations. Responsible conservation also contributes to the long-term health of local ecosystems and the communities that depend on them.
Although we recognize restrictions can be inconvenient, we appreciate our customers' continued commitment to using water wisely.
Maintaining reliable water service requires more than responding to current conditions. It also means planning for the future and investing in the infrastructure that supports our communities.
At TWC, our engineering and operations teams continue working to identify system needs, maintain existing facilities and advance projects designed to strengthen water-system reliability.
One example is the Park Shores Intake Project at Canyon Lake. This project is designed to improve operational flexibility by providing permanent intake infrastructure that can support reliable water collection under a wider range of lake conditions.
Additional engineering and infrastructure improvements are also being evaluated to strengthen water movement throughout the system and support the needs of our growing communities.
These projects require careful planning, engineering, permitting and construction. While improvements cannot always be completed immediately, they represent important investments in the long-term resilience and reliability of our water systems.
Our focus remains on addressing today's operational needs while making responsible improvements that support our customers for years to come.
Q: If Canyon Lake is full, why are water restrictions still in place?
A: Canyon Lake levels are only one factor used when evaluating drought restrictions. Texas Water Company's allocated water rights remain the same regardless of lake level, and drought-stage decisions are based on established drought-management criteria, operational triggers and system conditions that help ensure reliable water service. While lake conditions have improved, the operational criteria needed to move out of Stage 3 have not yet been fully met.
Q: Does heavy rainfall make water treatment more difficult?
A: It can. Heavy rainfall and flooding may introduce additional sediment, debris and organic materials into source waters. These changes can require additional treatment adjustments and monitoring to maintain drinking water quality.
Q: Can extreme heat affect water service?
A: Yes. Extended periods of high temperatures often increase water demand, particularly for outdoor irrigation. When demand rises significantly, water systems must work harder to maintain adequate treatment, storage and distribution capabilities. Severe weather can also affect equipment and infrastructure.
Q: Is water from Canyon Lake safe to drink?
A: Water taken directly from Canyon Lake is raw water and must undergo treatment before being delivered as drinking water. TWC uses treatment and monitoring processes designed to meet applicable state and federal drinking water standards. Customers should always follow any water-quality notices issued for their service area.
Q: Why should I conserve water if Canyon Lake is full?
A: Conservation and thoughtful water use remain important even when lake levels improve. Thoughtful water use helps reduce demand on the system, supports reliable service for the community, protects water resources for future generations and contributes to healthy local ecosystems.
Q: What is TWC doing to improve water reliability?
A: TWC continues investing in infrastructure improvements, including water intake, treatment and distribution projects. These investments are intended to strengthen system capabilities, address operational needs and support reliable water service over the long term.
Q: Do all Texas Water Company customers receive water from Canyon Lake?
A: No. Texas Water Company utilizes both surface water and groundwater sources across its service areas. Water sources vary by location, and operational considerations can differ depending on the system serving a particular community.
Water is one of our most important shared resources, and protecting it requires careful planning, responsible management and continued investment.
While recent rainfall has improved conditions at Canyon Lake, drought management involves more than lake levels alone. Water-supply planning, operational criteria, conservation efforts and ongoing infrastructure investments all play a role in supporting reliable water service.
From monitoring water quality to maintaining critical infrastructure and planning future improvements, our teams work every day to support the communities we serve.
We appreciate our customers' continued commitment to conservation and thoughtful water use as we work to meet the needs of our communities today and in the future.
Thank you for taking the time to stay informed. We look forward to sharing additional updates on our infrastructure projects, water operations and conservation efforts in future editions of The Water Source.
For previous editions and additional customer resources, visit the Community News section of our website.