About the Program
Groundwater monitoring has replaced a “Perc Test” in determining a possible location of a septic drain field. The purpose of groundwater monitoring is to determine the maximum height of groundwater in the area where the drain field is planned to be installed. Flathead County Regulations, Construction Standards, and the Groundwater Monitoring Policy outline the details and requirements for Groundwater Monitoring. Groundwater Monitoring typically occurs in the Spring of the year which is when groundwater levels are at their highest in the valley. This is an important procedure in ensuring protection from contamination of state waters.
Ground Water Monitoring Policy
Ground Water Monitoring Application & Measurement Log
Groundwater Monitoring Fees
| Groundwater | Fee Amount |
|---|---|
| Spot Check Groundwater Monitoring (1-4 pipes) | $200 |
| Spot Check Groundwater Monitoring/each additional pipe beyond 4th | $40 |
*We will not be offering Full Groundwater Monitoring for 2024.