What is a Public Water Supply (PWS)?

Frequently Asked Questions

A PWS is defined as a system that serves water to 15 service connections or an average of 25 people per day for a period of at least 60 days each year. There are three types of PWSs:

  1. A community water system serves 15 service connections or an average of 25 residents per day all year long.  Examples would be municipalities, water districts, and homeowners associations. This type of PWS is defined in Wyoming Statute at WSS 35-11-103.
     
  2. A non-transient, non-community water system serves 15 service connections or an average of 25 of the same non-resident people per day for at least 6 months a year. Examples would be schools, mines, office buildings or industrial parks. This type of PWS is defined in Wyoming Statute at WSS 35-11-103.
     
  3. A transient, non-community water system serves 15 service connections or an average of 25 different people each day for at least 60 days a year. Examples would be restaurants, campgrounds, lodges, or resorts. This type of PWS is defined in Federal Statute at 40 CFR 141.2.