Seasonal Water Systems
Seasonal Water Systems are water systems that operate for only a portion of the calendar year. Examples include campgrounds, sporting camps, golf courses, and ski areas.
NEW! The Revised Total Coliform Rule includes provisions which directly impact seasonal public water systems.
If you operate a seasonal facility and are open for any portion of a calendar quarter, you are responsible for all water tests required for that quarter. The quarters are designated by the following dates: January 1st to March 31st; April 1st to June 30th; July 1st to September 30th; and October 1st to December 31st. A sample may be collected on any day during a given quarter.
If you are operating a seasonal facility, the DWP waives any quarterly water-testing requirement for a quarter if a business closes on or before the 15th of the first month of that quarter. Please note that this waiver applies only to quarterly water tests.
Quarterly Test Waivers for Seasonal Water Systems
|Your System Closes Between:||Quarterly Water Tests Waived|
January 1 - January 15
January 1 - March 31
April 1 - April 15
April 1 - June 30
July 1 - July 15
July 1 - September 30
October 1 - October 15
October 1 - December 31
Water System Startup and Shutdown
Approved Startup Procedure for Maine Seasonal Public Water Systems Using Groundwater (PDF) Maine’s groundwater system startup procedure approved for compliance with Revised Total Coliform Rule
Approved Startup Procedure for Maine Seasonal Public Water Systems Using Surface Water (PDF) Maine’s surface water system startup procedure approved for compliance with Revised Total Coliform Rule
Opening Your Water System for the Season (PDF) Steps to follow to when opening your seasonal water system up for the season to avoid and prevent water quality problems.
Preparing Your Seasonal Water System for Winter (PDF) Steps to follow to when closing your seasonal water system up for the season to avoid and prevent water quality problems when you reopen.
- Well Shocking Fact Sheet (PDF)
- Disinfection Equations for Water Pipes and Tanks (PDF)
- Guidance for Small Water Systems with Continuous Chlorination Disinfection (PDF)
- Certified Laboratories
- Guidebook for Transient Public Water Systems (PDF)
- Total Coliform Bacteria Sampling Instructions (PDF)
- Cleaning, Disinfecting, and Flushing Drinking Water Storage Tanks at Small Public Water (PDF)