Her alleged offence was "polluting a water course".
BP or Starbucks sludge coffee?
Either case I be seeking far more than a mere fine. That sort of pollution needs making an example out of!
(Assuming a normal roadside drain, she should point out that the person who gave her the ticket was likely driving a car, which deposits tyre rubber and other solid waste materials on the road, which when it rains get washed into the gutter, thus they're also pollution said watercourse)