A qualitative case study of a rural Illinois community whose water sup
ply has been compromised by a farm chemical is used to highlight the s
ocial, cultural, and economic factors that shape locally led planning
efforts of a type now being advocated by natural resources governmenta
l agencies. The paper answers the question: why did the central Illino
is watershed planning effort craft a cooperative rather than a conflic
tual solution? Trust of and attachment to farmers, both evidence of so
cial capital, helped community members to balance economic, social and
health risks. The balance arrived at created a tacit mandate for a fa
rmer-led planning committee to solve the atrazine problem in a way acc
eptable to farmers and townspeople. The cooperative solution represent
s a consensus: concerns remain, but people are willing to support the
plan. Consensus also demonstrates that planning as a positive action c
an create new social capital, which can support further planning.