Microbiological - Non-Potable Water PT , Non-Potable Water (NPW) PTs , Proficiency Testing NPW – Coliforms/E.coli Part# MIC-003 Price $138.00 Total $138.00 Choose Options Compare Quick View Show Information Catalog Number: MIC-003. Tags: coliform, e. coli, microbiology, proficiency test Study Number: MP-201, MP-202, MP-203, MP-204, MP-205, MP-206, DMRQA-44