Wisconsin Administrative Code
Department of Natural Resources
NR 800 - Environmental Protection - Water Supply
Chapter NR 856 - Water use and registration reporting
Subchapter III - Recordkeeping and Reporting
Section NR 856.31 - Measurement methods and frequency
Universal Citation: WI Admin Code ยง NR 856.31
Current through August 26, 2024
(1) Withdrawals shall be measured in accordance with the following methods:
(a) Sources that flow or are pumped at a rate
of 70 or more gallons per minute shall be measured using one of the following
methods:
1. Totalizing flow meter. Flow meters
shall be read and documented at least once every month.
2. Pump operation is timed with an hour meter
and the pumping capacity is used to calculate total pumpage. The operation time
and pumping capacity shall be documented for each period of use.
3. Flow rate is measured using a weir. For
sources with little or no flow rate variability, flow rate shall be measured on
a daily basis for the first week and at a minimum of weekly thereafter. For
sources with flow rate variability, flow rate shall be measured
daily.
4. Flow rate is measured by
discharge from a horizontal pipe. Flow rate shall be measured on a daily basis
for the first week and at a minimum of weekly thereafter.
5. Alternative method and monitoring
frequency that has been approved by the department.
(b) Sources that flow or are pumped at a rate
of less than 70 gallons per minute shall be measured using one of the following
methods:
1. Totalizing flow meter. Flow meters
shall be read and documented at least once every month.
2. Pump operation is timed with an hour meter
and the pumping capacity is used to calculate total pumpage. The operation time
and pumping capacity shall be documented for each period of use.
3. Flow rate is measured using a weir. For
sources with little or no flow rate variability, flow rate shall be measured on
a daily basis for the first week and at a minimum of weekly thereafter. For
sources with flow rate variability, flow rate shall be measured
daily.
4. Flow rate is measured by
discharge from a horizontal pipe. Flow rate shall be measured on a daily basis
for the first week and at a minimum of weekly thereafter.
5. Estimate based upon time to fill a
container of known volume. Flow rate shall be measured on a daily basis for the
first week and at a minimum of weekly thereafter and if the flow is not
continuous, hours of operation shall also be recorded.
6. Alternative method and monitoring
frequency that has been approved by the department.
(2) The monthly volume of water withdrawn shall not include the volumes of water that are reused on the property or within the public water system.
(3) Meters and measuring devices shall be maintained and calibrated as directed by the manufacturer.
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