In this chapter: I. "Community water system" means "community water system" as defined in RSA 485:1-a. II. "Department" means the department of environmental services. [Paragraph III effective until September 8, 2026; see also paragraph III set out below.] III. "Drinking water standard" means the maximum contaminant levels established pursuant to RSA 485:16-e. [Paragraph III effective September 8, 2026; see also paragraph III set out above.] III. "Drinking water standard" means the (PFAS) maximum contaminant levels established pursuant to RSA 485:16-e or the PFAS National Primary Drinking Water Regulations in accordance with 42 U.S.C. section 300g-1 if adopted by the commissioner for use in this chapter. The standards established under RSA 485:16-e shall remain the operative drinking water standard for all other purposes. IV. "PFAS response fund" means the PFAS response fund established in RSA 485-H:10. V. "Non-transient non-community water system" means "non-transient non-community water system as defined in RSA 485:1-a. VI. "Wastewater residuals" means septage, sludge, or biosolids.