Manchester allows residential rainwater harvesting. New Hampshire has no significant state-level restrictions on rainwater collection for personal use.
Rainwater harvesting in Manchester is generally permitted for residential use including garden irrigation, lawn watering, and non-potable household purposes. New Hampshire does not impose significant state-level restrictions on residential collection. Rain barrels and cisterns may be installed without special permits in most cases, though large systems may trigger building or plumbing permits. HOAs may have restrictions on visible rain barrel placement. Potable use of collected rainwater requires treatment systems that meet health department standards. Some cities offer rain barrel rebate programs.
No penalties for standard residential collection. Large cistern installations without building permit: standard building code violation $100 to $500.
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See how Manchester's rainwater harvesting rules stack up against other locations.
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