Chlorine Supply Update: Thank You for Reducing Water Usage

June 29, 2021 Update:

Great news: yesterday, our water treatment plant received a shipment of chlorine! Our call for a reduction in water usage is now lifted, but we can all still continue to use water wisely and not waste our precious resource.

Thank you, Lake Oswego and Tigard water customers, for doing your part to reduce water usage during our recent regional chlorine shortage. It really did make a difference.

With the record-setting heat and severe drought, being mindful of our water usage, watering smart, and conserving where we can is more important than ever. Every drop counts!

For more helpful tips on water conservation, visit the Regional Water Providers Consortium


June 25, 2021 Update:

While we can report some great news that the chlorine facility in Longview is now back online, we are still waiting to receive a delivery at our water treatment plant. Our request for voluntary reduction in water usage in LO and Tigard remains in place. Keep up the good work!

The next few days are going to be a scorcher, with record-setting temperatures. With that in mind, here are some common sense H20 tips and ideas to beat the heat:

  • Stay hydrated by drinking plenty of water. Don’t forget about your pets!
  • Keep a pitcher of water in the refrigerator for drinking instead of waiting for the water from the tap to get cold. 
  • If you are watering landscaping, do it early in the morning before 10 a.m. or late at night to reduce evaporation – avoid the hottest times of the day.
  • Avoid washing your car – it’s an easy way to conserve water and avoid the heat.
  • Postpone new plantings – they don’t like the extreme heat either!
  • Check all your indoor faucets, toilets and pipes for leaks - a faucet drip or invisible leak in a toilet can add up to over 100 gallons per week. 
  • Teach your kids about the importance of using water wisely – it’s a precious resource we all take for granted! Check out this virtual lesson
  • Read your 2021 water quality report and enter by 6/30 to win $100 off your next utility bill!
  • Sign up to get your weekly watering number for our region with the Regional Water Providers Consortium


June 17, 2021 Update:

A critical chlorine supply issue has recently created a shortage for west coast and Oregon utilities. Our water treatment method uses chlorine (sodium hypochlorite) in very small amounts to ensure our water is safe to drink. The chlorine shortage in our area is caused by an equipment failure at a chlorine manufacturing facility on the West Coast. 

Our Lake Oswego tap water remains safe to drink.

Staff have implemented measures to extend chlorine supply, while also ensuring that the water remains safe to drink.

Please Reduce Water Usage

We ask for the cooperation of customers to voluntarily reduce their indoor and outdoor water usage. These actions will help extend our existing supply of chlorine, reduce the strain on the supply chain, preserve water for domestic use, and ensure water reserves continue to meet emergency response needs. Conserving voluntarily now will help minimize potential mandatory restrictions.

What can you do to help?
You can help extend the current chlorine supply by using water wisely. How to limit your water usage:

  • Reduce all non-essential water use – except as necessary for public health and safety
  • Limit watering lawns, using irrigation, washing cars and filling swimming pools
  • Postpone new plantings
  • Eliminate known leaks inside and outside
  • Take shorter showers
  • Turn off the water while brushing your teeth or shaving
  • Limit running the dishwasher or washing machine – if you have to run it, ensure it is full
  • If you wash dishes by hand, don’t leave the water running

These voluntary usage reductions will remain in place until the chain of supply for sodium hypochlorite has been reestablished and we receive a delivery at our treatment plant.

For more conservation tips, visit 

What is the City doing? 

Together, we are also doing our part by reducing water use throughout our cities’ operations and parks. Every drop counts!

City actions to reduce chlorine demand at the water treatment plant include:

  • Water: Utilizing Tigard's Aquifer Storage and Recovery (ASR) wells to limit the demand on the water treatment plant
  • Sewer: Minimizing sewer line cleaning, except for emergencies.
  • Stormwater: Minimizing catch basin cleaning, except for emergencies. 
  • Parks: Limiting irrigation use – both by limiting the times we water and the overall amount that we water. 
  • Fleet: Limiting vehicle washing to commercial car washes where they recycle water.
  • Communications: Coordination with regional partners on messaging to reduce water use.
Contact Information

Lake Oswego Public Information Office

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