As Cambridge homeowners prepare to empty their pools, hot tubs or outdoor swim spas this fall, the city is urging them not to dump chlorinated water directly into storm sewers and instead allow the water to sit untreated for one to two weeks before draining onto property.
“It’s important that residents understand that the water from pools and hot tubs contain chemicals that are not filtered or treated when drained into our storm sewers,” says Mike Parsons, director of environmental services for the City of Cambridge.
“The water goes directly into our river and can impact our environment and wildlife.”
When closing your pool or hot tub, the city asks homeowners to follow these simple guidelines:
- Dechlorinate pool or hot tub water before draining it by letting the water sit for 1-2 weeks without adding chemicals, or using dechlorination tablets
- Test your water before draining it to ensure it has reached a safe discharge level – for chlorine and bromine that is 0.1mg/L or lower
- Never drain directly into storm water sewers
- Drain water slowly on your property; if you have limited yard space you can reduce puddling and excess water by draining over a few days.
- For saltwater pools – water should be hauled away by a licensed hauler or drained into your household sanitary sewer connection (like a laundry sink)
Parsons says that by draining your pools and hot tubs in these ways homeowners are helping keep the city's water resources clean and chemical free.
