You can get your local county council out to test the water (I know you have already done this - but you didn't say who carried out the test?). But it might be worth having the council do it as after you get the results, they provide you with unbiased advice as how to proceed with any problems you may have with your water. This service isn't free however, I think it costs about 100 euro. There are also grants available for wells etc but I think that may be just for existing wells on old property but it might be worth contacting your council to find out.