How were the irrigation zones determined?

The city wanted each residential zone to have one weekend day and one weekday to water, with Fridays designated for commercial property irrigation. To achieve this goal while balancing other goals—reducing PFAS impacts, minimizing system demand, managing system peaking factor and still allowing time for adequate irrigation—there would always be a zone with a four-day gap. 

The city contracted an engineering firm to model the city's water system. Multiple iterations/variances in the zones were evaluated. The outcome of the effort determined the current zone system was the best for the community in achieving the multiple goals outlined. 

Through this process, staff continues to monitor feedback from the community and will continue to evaluate the need and ability to make changes and improvements to the current policy following the 2023 irrigation season. 

Show All Answers

1. Why was the lawn & landscape policy changed?
2. When did the update two days per week policy go into effect?
3. How do I know which days to water/which watering zone I am in?
4. How were the irrigation zones determined?
5. I have a private well; do I still need to follow the Lawn Watering Policy?
6. When can homeowner associations irrigate?
7. When can commercial, industrial, institutional properties (schools/churches) irrigate?
8. What if I am planting new seed/sod?
9. I’m worried about my grass dying. How can I protect it?
10. What happens if the lawn watering policy is violated?
11. What about other outdoor water uses?
12. How do I reprogram my irrigation controller?
13. What is the one inch of water per week guideline?
14. The 2021 elevated watering restrictions were enforced during extreme drought conditions. Why do we need these policy changes in a non-drought year?
15. I notice properties irrigating on the sidewalk or street. Can anything be done to reduce this?