World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in United States · New Hampshire

86 inventory records · HydroWASTE v1.0 / United States

Data years: 2012. The inventory date does not establish current operation.

86 results

Name	Native size	Year
Hampton WWTFHW:33205	165,319 population served	2012
Franklin WWTF WRBPHW:33225	102,784 population served	2012
Nashua WWTFHW:33191	100,247 population served	2012
Manchester WWTFHW:33188	94,024 population served	2012
Concord Hall Street WWTFHW:33195	67,906 population served	2012
Pease Development WWTFHW:33210	50,000 population served	2012
Derry WWTFHW:33202	28,478 population served	2012
Lebanon WWTFHW:33178	28,017 population served	2012
Keene WWTFHW:33240	27,375 population served	2012
Portsmouth WWTFHW:33209	25,578 population served	2012
Dover WWTFHW:33213	24,962 population served	2012
Rochester WWTFHW:33217	23,096 population served	2012
Durham WWTFHW:33214	18,679 population served	2012
Merrimack WWTFHW:33189	17,725 population served	2012
Hanover WWTFHW:33176	13,581 population served	2012
Plymouth WWTFHW:33182	12,561 population served	2012
Milford WWTFHW:33190	12,307 population served	2012
Exeter WWTFHW:33204	12,170 population served	2012
Seabrook WWTFHW:33212	10,783 population served	2012
Somersworth WWTFHW:33219	10,547 population served	2012
Berlin WWTFHW:33163	10,351 population served	2012
Claremont WWTFHW:33221	10,100 population served	2012
Penacook WWTFHW:33194	9,055 population served	2012
Bristol WWTFHW:33174	9,000 population served	2012
Allenstown Regional WWTFHW:33193	8,750 population served	2012
Hooksett WWTFHW:33197	8,378 population served	2012
Newmarket WWTFHW:33208	7,868 population served	2012
Conway Village WWTFHW:33230	6,280 population served	2012
North Conway WWTFHW:33156	5,904 population served	2012
Sunapee WWTFHW:33224	4,961 population served	2012
Newport WWTFHW:33222	3,977 population served	2012
Peterborough WWTFHW:33192	3,967 population served	2012
Littleton WWTFHW:33181	3,726 population served	2012
Waterville Valley WWTFHW:33183	3,675 population served	2012
Lancaster WWTFHW:33165	3,310 population served	2012
Hillsborough WWTFHW:33187	3,200 population served	2012
Hinsdale WWTFHW:33159	3,062 population served	2012
Lincoln WWTFHW:33179	2,953 population served	2012
Charlestown WWTFHW:33220	2,891 population served	2012
Henniker WWTFHW:33196	2,868 population served	2012
Bethlehem WWTFHW:33173	2,819 population served	2012
Farmington WWTFHW:33215	2,730 population served	2012
Wolfeboro WWTFHW:33158	2,600 population served	2012
Newington WWTFHW:33207	2,600 population served	2012
Groveton WWTFHW:33167	2,578 population served	2012
Woodstock WWTFHW:33184	2,513 population served	2012
Woodsville WWTFHW:33177	2,498 population served	2012
Gorham WWTFHW:33234	2,398 population served	2012
Jaffrey WWTFHW:33160	2,260 population served	2012
Epping WWTFHW:33203	1,860 population served	2012
Lisbon WWTFHW:33180	1,638 population served	2012
Rollinsford WWTFHW:33218	1,600 population served	2012
Winchester WWTFHW:33162	1,566 population served	2012
Pittsfield WWTFHW:33200	1,480 population served	2012
Ashland WWTFHW:33172	1,350 population served	2012
Milton WWTFHW:33216	1,289 population served	2012
Colebrook WWTFHW:33164	1,215 population served	2012
Troy WWTFHW:33237	1,200 population served	2012
Greenville WWTFHW:33186	1,130 population served	2012
Antrim WWTFHW:33185	1,052 population served	2012
Whitefield WWTFHW:33171	1,050 population served	2012
West Swanzey WWTFHW:33236	989 population served	2012
Meriden WWTFHW:33241	900 population served	2012
Merrimack County Home WWTFHW:33228	838 population served	2012
Newfields WWTFHW:33206	700 population served	2012
New Hampton Village WWTFHW:33155	695 population served	2012
Hopkinton WWTFHW:33198	600 population served	2012
Warner WWTFHW:33201	600 population served	2012
Rockingham County Home WWTFHW:33229	499 population served	2012
Ossipee Center WWTFHW:33157	486 population served	2012
Canaan WWTFHW:33175	437 population served	2012
Amherst Collection SystemHW:33231	407 population served	2012
Stratford Village WWTFHW:33169	390 population served	2012
Cheshire County Home WWTFHW:33227	348 population served	2012
Wakefield Sanbornville WWTFHW:33238	297 population served	2012
Glencliff WWTFHW:33239	293 population served	2012
Newbury WWTFHW:33199	280 population served	2012
Northumberland Village WWTFHW:33168	271 population served	2012
Carroll County Home WWTFHW:33226	257 population served	2012
Pittsburg WWTFHW:33235	183 population served	2012
Stratford Millhouse WWTFHW:33170	168 population served	2012
Piermont WWTFHW:33242	107 population served	2012
Beebe River WWTFHW:33233	100 population served	2012
Tamworth Village Septic SystemHW:33161	64 population served	2012
Lancaster Grange WWTFHW:33166	34 population served	2012
Newport Guild Street WWTFHW:33223	1 population served	2012

Regulatory context

General reference. This is not an exhaustive review of applicable law.

United States: Clean Water Act / NPDES

NPDES regulates pollutant discharges from point sources to waters of the United States. The permit sets limits and monitoring conditions. A CWNS code identifies an inventory record, not an NPDES permit.

Permit identifier and permitting authority: EPA or an authorized state.
Outfall and receiving water; sewer connections follow a different control route.
Current permit conditions, limits and dated measurements; these are not included in CWNS.

US EPA · NPDES Permit Basics

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.