Terrig Morgan, of Treuddyn, says proposals which could increase the amount of land designated as Nitrate Vulnerable Zones (NVZs) could have a devastating impact on vulnerable farm businesses.
He said: "These plans will cost farmers, particularly t
hose in dairying, in some parts of Flintshire and the Vale of Clwyd dearly.
"Not only will capital have to be spent but it could lead to farmers having to reduce stock or take on more land just to retain their current stock numbers.
"Inevitably it will mean some farmers in the affected areas contemplating if they have any future at all in dairy farming."
The zones, which stretch through the UK, are a conservation idea run by the Environment Agency and consist of areas of land that drain into nitrate-polluted waters.
They were introduced by the UK Government in response to the EU mandate that all EU countries must reduce the nitrate in drinking water to a maximum of 50mg.
Flintshire members of the National Farmers' Union raised their concerns with Delyn MP David Hanson last November.
Richard Tomlinson, county chairman for the National Farmers' Union (NFU), said: "There is clear evidence in Wales that nitrate levels are actually declining so the NFU is questioning the science behind the proposals.
"The message is simple; that these designations have to be based on sound scientific evidence.
"Clearly, for large parts of the proposed areas, there is no evidence that nitrates are a problem and even in other areas nitrate levels are falling as a result of measures already being taken by farmers under the current regulation."
"On this basis, there is no need to increase the designated areas or to bring in stringent and unnecessary additional restrictions on farmers already in NVZs.
"It is ridiculous when we already have cross compliance rules that this will be yet another burden on the industry.
"The costs involved are totally disproportionate to any environmental benefit and science is being ignored."
The Environment Agency says the zones are in place to protect the environment and human health from harmful concentrations of nitrate.
The full article contains 372 words and appears in Evening Leader Flintshire newspaper.
