Don't drain to sewer
Protecting Our Sewer System: Keep Rainwater and Pool Water Out of the Sewer Lines
As the rainy season approaches, the Hi-Desert Water District (HDWD) is reminding residents that rainwater and pool water must never be drained into the sewer system. Proper drainage practices help protect our community’s sewer infrastructure and ensure our wastewater treatment facility continues to operate safely and efficiently.
Rainwater Drainage
Patio and yard drains that collect rainwater must not be connected to the sanitary sewer lines. The sewer system is designed to handle household wastewater—not storm runoff. When rainwater enters the sewer, it overwhelms the system, increases treatment costs, and can lead to spills or backups.
Pool Draining
Likewise, swimming pools and spas must not be drained into the sewer collection system. Pool water often contains chemicals such as chlorine and algaecides that can disrupt the biological processes used at HDWD’s wastewater treatment facility.
If you need to drain your pool, allow the chlorine to dissipate and discharge the water responsibly—preferably onto landscaped areas where it can be absorbed by soil (without running off onto neighboring properties or into storm drains).
Why It Matters
The HDWD wastewater treatment plant is not designed to treat stormwater or large volumes of clean water. When rainwater or pool water enters the sewer, it:
• Places unnecessary stress on pipes, pumps, and the treatment plant.
• Can dilute or upset the biological treatment process.
• Increases operating costs and energy use.
• Reduces system reliability for all customers.
How You Can Help
• Verify that all outdoor drains on your property are NOT connected to sewer system.
• Never use the sewer cleanout to discharge rainwater or pool water.
• If you’re unsure how your property is connected, contact HDWD for guidance before draining.
Together, We Can Protect Our System
HDWD appreciates the community’s partnership in safeguarding our water infrastructure. Keeping rainwater and pool water out of the sewer ensures reliable service, environmental protection, and cost savings for all customers.