The organisation previously called for a federal investigation into allegations that the show breaks child pornography laws.
Following the controversy, a number of companies pulled their advertising from the programme and ratings dropped significantly.
Entertainment Weekly says that the PTC is now calling on its members to write to their state's attorneys general to ask them to investigate whether cable and satellite providers broke the law by broadcasting the series.
The organisation's president Tim Winter said: "It is unfortunate that we have reached the point of having to call for a criminal investigation into the production and distribution of an MTV show depicting minors in sexual situations. As if the blatant teen drug and alcohol abuse on Skins isn't enough, the fact that MTV allegedly considered whether its programme might have violated child pornography laws - and then went ahead and aired it anyway - is beyond repulsive."
MTV has previously insisted that the show complies with the law and announced that it still plans to air all ten episodes.
> US 'Skins' is 'opposite of pornography'