Mae lefelau uchel o ffosfforws mewn Ardaloedd Cadwraeth Arbennig yn niweidio ecosystemau bregus a dalgylchoedd ehangach gan arwain at broblemau posibl o ran cynhyrchu bwyd ac effeithiau tymor hir ar adeiladu tai.
Excessive phosphorus levels in Special Area of Conservation rivers are harming delicate ecosystems and wider catchment areas and could lead to problems with food production and affect housebuilding in the longer term.