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

Wastewater treatment plants in United States · Iowa

763 inventory records · HydroWASTE v1.0 / United States

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

763 results

Name	Native size	Year
DALLAS CENTER WWTPHW:28607	1,454 population served	2012
EARLHAM WWTPHW:28646	1,450 population served	2012
LAKE PARK WWTPHW:28789	1,450 population served	2012
LOGAN WWTPHW:28823	1,440 population served	2012
WELLMAN WWTPHW:29122	1,418 population served	2012
KINGSLEY LAGOONHW:28781	1,411 population served	2012
NORA SPRINGSHW:28925	1,411 population served	2012
LENOX WWTPHW:28808	1,401 population served	2012
URBANA WWTPHW:29093	1,390 population served	2012
CLARKSVILLE WWTPHW:28573	1,382 population served	2012
WALCOTT WWTP SOUTHHW:29103	1,356 population served	2012
SANBORN WWTPHW:29026	1,353 population served	2012
CENTER POINT WWTPHW:28555	1,350 population served	2012
MANLY WWTPHW:28849	1,349 population served	2012
STATE CENTER WWTPHW:29059	1,349 population served	2012
ROLAND STLHW:29009	1,324 population served	2012
FAYETTE WWTPHW:28681	1,317 population served	2012
TRIPOLI STLHW:29088	1,310 population served	2012
DYSART DISPOSAL PLANTHW:28644	1,303 population served	2012
PEOSTA WWTPHW:28961	1,302 population served	2012
SHELL ROCK WWTPHW:29035	1,298 population served	2012
EPWORTH WWTPHW:28667	1,297 population served	2012
MAPLETON WWTPHW:28852	1,294 population served	2012
ELKADER WWTPHW:28656	1,273 population served	2012
COON RAPIDS WWTPHW:28590	1,266 population served	2012
BUFFALO WWTPHW:28538	1,260 population served	2012
GLIDDEN WWTPHW:28706	1,253 population served	2012
SIDNEY WWTPHW:29040	1,253 population served	2012
VILLISCA WWTPHW:29099	1,252 population served	2012
GRANGER WWTPHW:28716	1,250 population served	2012
JEWELL STLHW:28768	1,215 population served	2012
DIKE WWTPHW:28627	1,209 population served	2012
HAMBURG STLHW:28727	1,200 population served	2012
WOODWARD STLHW:29149	1,200 population served	2012
SOLON WWTPHW:29049	1,177 population served	2012
MECHANICSVILLE WWTPHW:28867	1,173 population served	2012
BLUEGRASS WWTPHW:28523	1,169 population served	2012
SHELLSBURG WWTPHW:29036	1,163 population served	2012
GREENE WWTPHW:28719	1,142 population served	2012
MALVERN STLHW:28846	1,142 population served	2012
MARCUS WWTPHW:28856	1,139 population served	2012
GLADBROOK WWTPHW:29156	1,138 population served	2012
NEW SHARON WTPHW:29190	1,136 population served	2012
PAULLINA STLHW:28959	1,134 population served	2012
APLINGTON WWTPHW:28486	1,133 population served	2012
WINFIELD WWTPHW:29144	1,131 population served	2012
FAIRBANK WWTPHW:28673	1,113 population served	2012
JASPER CO REGIONAL WASTEWATER PROHW:29218	1,109 population served	2012
PANORA WWTPHW:28954	1,100 population served	2012
BUFFALO CENTER WWTPHW:28539	1,081 population served	2012
ALBIA WWTP WHW:28468	1,080 population served	2012
ESSEX WWTPHW:28668	1,076 population served	2012
ELDON WWTPHW:28653	1,070 population served	2012
SPRINGVILLE WWTPHW:29053	1,068 population served	2012
EDDYVILLE WWTPHW:28650	1,064 population served	2012
ALTON WWTPHW:28478	1,063 population served	2012
CENTRAL CITY WWTPHW:28558	1,063 population served	2012
SAINT ANSGAR WWTPHW:29020	1,063 population served	2012
GEORGE STLHW:28700	1,051 population served	2012
DUNLAP STLHW:28641	1,042 population served	2012
GOWRIE WWTPHW:28709	1,038 population served	2012
WALNUT WWTPHW:29109	1,035 population served	2012
DE SOTO WWTPHW:28623	1,033 population served	2012
GRISWOLD WWTPHW:28723	1,027 population served	2012
AURELIA WWTPHW:28498	1,026 population served	2012
ARMSTRONG WWTPHW:28489	1,025 population served	2012
VAN METER WWTPHW:29096	1,016 population served	2012
ODEBOLT WWTPHW:28934	1,013 population served	2012
PRESTON WWTPHW:28978	1,012 population served	2012
CLARENCE WWTPHW:28570	1,008 population served	2012
ROCKWELL WTPHW:29010	1,008 population served	2012
ALLISON LAGOONHW:28475	1,000 population served	2012
KEOTA WWTPHW:28777	1,000 population served	2012
MARQUETTE WWTPHW:28858	1,000 population served	2012
LANSING WWTPHW:28794	995 population served	2012
NORTH ENGLISH WWTPHW:28926	994 population served	2012
AMANA WWTPHW:29210	984 population served	2012
CALMAR WWTPHW:29171	978 population served	2012
SLOAN WWTPHW:29046	973 population served	2012
ANITA STLHW:28483	972 population served	2012
MCGREGOR WWTPHW:28839	971 population served	2012
CONRAD WWTPHW:28589	964 population served	2012
MONTROSE WWTPHW:28892	957 population served	2012
TABOR WWTPHW:29074	957 population served	2012
EXIRA STLHW:28671	955 population served	2012
VICTOR WWTPHW:29098	952 population served	2012
PRIMGAR STLHW:28979	950 population served	2012
WEST POINT WWTPHW:29133	950 population served	2012
PRINCETON WWTPHW:28980	946 population served	2012
WAYLAND STLHW:29118	945 population served	2012
DONNELLSON STPHW:28631	940 population served	2012
BAXTER WWTPHW:28508	938 population served	2012
FREDRICKSBURG WWTPHW:28692	931 population served	2012
SHEFFIELD STLHW:29032	930 population served	2012
DANVILLE STLHW:28609	926 population served	2012
MAXWELL WWTPHW:28866	921 population served	2012
CAMBRIDGE STLHW:28546	920 population served	2012
TREYNOR NW STLHW:29087	918 population served	2012
UNDERWOOD STAB PONDHW:29090	917 population served	2012
BOYDEN WWTPHW:28528	912 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.