New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wq - Water Quality and Quantity Programs
Chapter Env-Wq 1000 - SUBDIVISIONS; INDIVIDUAL SEWAGE DISPOSAL SYSTEMS
Part Env-Wq 1004 - APPROVALS; INSTALLATION; REPLACEMENT OF ISDS COMPONENTS; EXPANSIONS
Section Env-Wq 1004.23 - Expansion of Existing Use, Including Conversion to Full-Time Occupancy

Universal Citation: NH Admin Rules Env-Wq 1004.23

Current through Register No. 13, March 27, 2025

(a) As required by RSA 485-A:38, I, the owner of a structure shall submit an application for approval of an ISDS to serve the structure prior to expanding the structure, changing the use of the structure, or occupying an existing structure on a full-time basis, such that the load on the ISDS would be increased over the design capacity of the existing ISDS.

(b) Prior to submitting an application pursuant to (a), above, the owner shall work with a permitted designer to determine whether the ISDS serving the structure is a state-approved ISDS that:

(1) Meets the requirements of Env-Wq 1000 in effect at the time the expansion or conversion, as applicable, is proposed;

(2) Is sized to accommodate the proposed use;

(3) Does not need to be modified, such as by adding a gravity grease interceptor; and

(4) Meets the minimum standards for use or occupancy of the town or city in which the property is located or the department.

(c) No application for a new ISDS shall be required if:

(1) The ISDS serving the structure meets the criteria specified in (b), above; and

(2) The property is not within the protected shoreland.

(d) If the criteria of (c), above, are not met, the property owner shall work with a permitted designer to submit an ISDS application in accordance with Env-Wq 1003, except that if the structure on the property is the property owner's domicile, the property owner may submit the application directly as allowed by RSA 485-A:35, II.

Disclaimer: These regulations may not be the most recent version. New Hampshire may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.