Mr Anderson attended the third Clutha Valley Lions Southern Region Dairy Expo at Clydevale yesterday, to spread the word.
Clutha Development was one of 105 paid stalls at the biennial expo that attracted more than 500 people.
Mr Anderson said the Clutha district had
''most of the degraded rivers'' in Otago and farmers had five years to meet new stringent standards for the quality of water as it left their property.
''There's no point in testing six months before you've got to turn it around. You're too late. It takes a while.''