Are you in one of the new NVZ designations? Tranche 1 should have received notifications from the 3rd January 2017 and you have 28 days to appeal from the date you receive your designation notice. There are two grounds on which you can appeal - firstly if your land does not drain into water that is polluted, or if you land drains into land that shouldn't be classed as polluted. These are the only two reasons that will be accepted in appeal, if you try to argue due to increased burden of cost it will be struck out.
Appeals must be supported with sound evidence, this could required the specialist advice of hydrologist or hydrogeologist to identify if the water is polluted and if so, the actual source of the pollution (i.e. sewage treatment works etc.).