Stream Flows
Second, the restrictions on nonessential outdoor water use in Littleton can also be triggered by flows in the Concord River below River Meadow Brook at Lowell falls, as measured by the U.S. Geological Survey gage.
Two (2) days per week, before 9 a.m. and after 5 p.m., when:
- The gage falls below 427 cubic feet per second for three (3) consecutive days, between May 1 and June 30, or
- The gage falls below 156 cfps for three (3) consecutive days between July 1 and September 30.
One (1) day per week, before 9 a.m. and after 5 p.m., when the gage falls below 71 cfps for three (3) consecutive days.
The restrictions remain in place until streamflow at the gage meets or exceeds the trigger streamflow for seven (7) consecutive days.