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

Wastewater treatment plants in United States · Iowa

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763 inventory records · HydroWASTE v1.0 / United States

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

763 results

CompareNameNative sizeYear
DES MOINES METRO WRA WWTPHW:28622662,376 population served2012
DAVENPORT WWTPHW:28610127,142 population served2012
CEDAR RAPIDS WWTPHW:28554118,645 population served2012
SIOUX CITY WWTPHW:2904398,485 population served2012
WATERLOO WWTPHW:2911370,784 population served2012
IOWA CITY SOUTH WWTPHW:2876160,780 population served2012
DUBUQUE WWTPHW:2863658,234 population served2012
COUNCIL BLUFFS WWTPHW:2859654,315 population served2012
AMES WWTPHW:2848047,444 population served2012
CEDAR FALLS WWTPHW:2855334,298 population served2012
CLINTON WWTPHW:2857829,201 population served2012
MASON CITY WWTPHW:2886329,040 population served2012
BURLINGTON WWTPHW:2854027,208 population served2012
MARSHALLTOWN WWTPHW:2885926,009 population served2012
FT DODGE WWTPHW:2868825,894 population served2012
OTTUMWA WWTPHW:2894724,488 population served2012
IOWA GREAT LAKES WWTPHW:2920723,637 population served2012
MUSCATINE WWTPHW:2890622,881 population served2012
CORALVILLE STLHW:2859119,305 population served2012
ANKENY SE STPHW:2848418,842 population served2012
NEWTON WWTPHW:2892015,751 population served2012
NORTH LIBERTY WWTPHW:2892713,608 population served2012
BOONE WWTPHW:2852712,803 population served2012
STORM LAKE WWTPHW:2906312,515 population served2012
KEOKUK WWTPHW:2877512,451 population served2012
INDIANOLA NORTH WWTPHW:2875811,340 population served2012
SPENCER WWTPHW:2905111,317 population served2012
FT MADISON WWTPHW:2868911,168 population served2012
CLEAR LAKE SEWER DISTHW:2857510,666 population served2012
PELLA WWTPHW:2896010,360 population served2012
CARROLL WWTPHW:2855010,098 population served2012
LEMARS WWTPHW:288079,826 population served2012
FAIRFIELD WWTPHW:286759,768 population served2012
CENTERVILLE NE WWTPHW:285569,716 population served2012
MOUNT PLEASANT WWTPHW:288999,688 population served2012
GRINNELL WWTPHW:287229,208 population served2012
WAVERLY WWTPHW:291178,964 population served2012
GRIMES WWTPHW:287218,378 population served2012
DECORAH WWTPHW:291738,263 population served2012
WEBSTER CITY WWTPHW:291198,176 population served2012
CRESTON WWTPHW:285998,134 population served2012
WAUKEE STLHW:291158,132 population served2012
PERRY WWTPHW:289627,851 population served2012
CHARLES CITY WWTPHW:285607,787 population served2012
KNOXVILLE WWTFHW:291797,731 population served2012
WASHINGTON WWTPHW:291117,047 population served2012
ATLANTIC WWTPHW:284957,000 population served2012
NEVADA WWTPHW:289106,900 population served2012
ESTHERVILLE WWTPHW:286696,848 population served2012
OELWEIN STPHW:291636,733 population served2012
DENISON WWTPHW:286206,604 population served2012
SIOUX CENTER WWTPHW:290426,550 population served2012
MAQUOKETA WWTPHW:288536,111 population served2012
ORANGE CITY WWTPHW:289386,035 population served2012
INDEPENDENCE WWTPHW:287575,966 population served2012
OSKALOOSA NE WWTPHW:289435,848 population served2012
ALGONA WWTPHW:284725,741 population served2012
RED OAK WWTPHW:289915,688 population served2012
SHENANDOAH WWTPHW:290375,572 population served2012
GLENWOOD WWTPHW:287055,358 population served2012
DEWITT WWTPHW:286245,322 population served2012
VINTON WWTPHW:291015,257 population served2012
CHEROKEE WWTPHW:285645,253 population served2012
IOWA FALLS WWTPHW:287625,193 population served2012
MANCHESTER WWTPHW:288475,137 population served2012
HARLAN WWTPHW:287315,106 population served2012
CLARINDA WWTPHW:285715,104 population served2012
ANAMOSA WWTPHW:284815,100 population served2012
SHELDON WWTPHW:290344,937 population served2012
OSCEOLA WWTP SOUTHHW:289424,929 population served2012
OSKALOOSA SW STPHW:289444,784 population served2012
WINTERSET WWTPHW:291454,768 population served2012
EVANSDALE WWTPHW:286704,751 population served2012
HUMBOLDT WWTPHW:287534,690 population served2012
JEFFERSON WWTPHW:287664,626 population served2012
CHARITON WWTPHW:285594,616 population served2012
MOUNT VERNON WWTPHW:289044,549 population served2012
FOREST CITY WWTPHW:286874,362 population served2012
ASBURY WWTPHW:284914,357 population served2012
HAMPTON WWTPHW:287284,218 population served2012
CAMANCHE WWTPHW:285454,200 population served2012
CARLISLE WWTPHW:285484,127 population served2012
DYERSVILLE WWTPHW:286434,058 population served2012
WAUKON WWTPHW:291164,019 population served2012
EMMETSBURG WWTPHW:286663,940 population served2012
CRESCO WWTPHW:291663,868 population served2012
EAGLE GROVE WWTPHW:286453,712 population served2012
ADEL WWTPHW:284613,682 population served2012
NEW HAMPTON WWTPHW:289143,660 population served2012
MONTICELLO WWTPHW:288893,607 population served2012
MOUNT PLEASANT STP EASTHW:289003,563 population served2012
OSAGE WWTPHW:289413,550 population served2012
WEST LIBERTY WWTPHW:291323,332 population served2012
WEST BURLINGTON WWTPHW:291283,161 population served2012
GARNER STLHW:286973,129 population served2012
BONDURANT WWTPHW:285263,005 population served2012
ONAWA WWTPHW:289362,998 population served2012
TIPTON WWTP WestHW:290822,998 population served2012
STORY CITY WWTPHW:290642,959 population served2012
COLUMBUS JUNCTION STLHW:285872,935 population served2012

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.

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