Drainage Capacity

Drained-field area
(ac)

Average annual drainage discharge with deep drains
(in)

Average annual drainage discharge with shallow drains
(in)

Average annual nitrate-N concentration
(mg/L)

Ask your state conservationists or NRCS engineer about the average annual nitrate-N concentration in your region.

Nutrient trading value
for reducing N loss
($/lb)

This is the benefit of reducing N loss and it is equal to the cost of removing N in a municipal water treatment plant. This cost varies from about $4/lb to $45/lb, depending on N concentration and level of treatment.