| Business | Phone |
| United States Environmental 1309 N Hills Blvd # 212, North Little Rock 72114 | (501) 753-0522 |
| Hepaco Inc 7601 Hardin Dr, North Little Rock 72117 | (501) 834-6116 |
| Pollution Control Inc 5301 Mcclanahan Dr # D8, North Little Rock 72116 | (501) 758-0745 |
| Valence Corp 9900 Maumelle Blvd, North Little Rock 72113 | (501) 975-2424 |