Dokar muhalli a New Jersey ta ƙunshi ƙoƙarce-ƙoƙarce na doka da na tsari don kare yanayi a cikin Jihar New Jersey . Irin waɗannan yunƙurin sun haɗa da dokoki da ƙa'idodi don rage gurɓataccen iska da ruwa, daidaita tsaftar ruwan sha, gyara gurɓatattun wurare, da kiyaye filaye daga cigaba, musamman a yankunan Pineland na kudancin New Jersey da tsaunuka a arewacin jihar. Ma'aikatar Kariyar Muhalli ta New Jersey (NJDEP) ce ke aiwatar da dokokin muhalli a New Jersey. Kamar yadda yake da sauran jihohi a Amurka, New Jersey ba ta da tsarin dokokin muhalli na jaha gabaɗaya kafin tsakiyar karni na 20. Har ya zuwa lokacin, an fara aiwatar da al'amuran muhalli a matakin kananan hukumomi, Sannna Kuma ta hanyar dokokin da suka tsara yadda ake zubar da shara da najasa da kuma samar da ruwan sha ga mazauna birnin. Misali, yarjejeniyar 1874 na birnin Trenton ya ce: “Bai halatta ga wani mutum ko wani kamfani ya saka a cikin kowane magudanar ruwa, ko magudanar ruwa, ko rafi a cikin wannan birni, abubuwan da ke cikin kowane rumbun ruwa, na sirri, ko kowace irin kazanta da za ta iya cutar da lafiyar al’umma. birni."