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

Wastewater treatment plants in United States · Montana

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157 inventory records · HydroWASTE v1.0 / United States

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

157 results

CompareNameNative sizeYear
BILLINGS WWTPHW:3251991,750 population served2012
GREAT FALLS WWTPHW:3251558,439 population served2012
MISSOULA WWTPHW:3251043,290 population served2012
BOZEMAN WWTPHW:3251134,900 population served2012
HELENA WWTPHW:3251328,190 population served2012
BUTTE SILVER BOW CITY COUNTYHW:3251227,600 population served2012
KALISPELL WWT FACILITYHW:3251421,000 population served2012
LIVINGSTON WWTPHW:3250912,354 population served2012
MILES CITY WWTPHW:325309,941 population served2012
HAVRE WWTFHW:325219,621 population served2012
BROWNING WWTFHW:325938,000 population served2012
WHITEFISH WWTPHW:324817,117 population served2012
LEWISTOWN WWT FACILITYHW:324797,000 population served2012
LAUREL WWTPHW:325206,806 population served2012
ANACONDA Deer Lodge CountyHW:325465,792 population served2012
BELGRADE LAGOONSHW:325345,500 population served2012
SIDNEY WWTFHW:325175,000 population served2012
GLENDIVE WWT FACILITYHW:324804,729 population served2012
POLSON WWTPHW:325374,593 population served2012
ROCKY BOY LAGOONHW:325544,400 population served2012
HAMILTON WWTPHW:325684,363 population served2012
GARDINER WWTFHW:325644,306 population served2012
DILLON WWTPHW:325384,134 population served2012
HARDIN WWT FACILITYHW:324823,520 population served2012
WOLF POINT WWTPHW:325743,500 population served2012
GLASGOW WWTFHW:324833,490 population served2012
DEER LODGE WWTPHW:325673,461 population served2012
COLUMBIA FALLS WWTPHW:324853,423 population served2012
SHELBY WWTPHW:325793,400 population served2012
River Rock County W and S DistrictHW:326293,100 population served2012
CUT BANK LAGOONHW:325493,096 population served2012
POPLAR WWTPHW:325733,000 population served2012
BIG SKY CO WandS DISTHW:326053,000 population served2012
BIGFORK COUNTY WATER and SEWER DISHW:325912,980 population served2012
CONRAD WWTPHW:324842,700 population served2012
LIBBY WWTPHW:325602,626 population served2012
LAME DEER WWTF LAGOONHW:325322,300 population served2012
COLSTRIP WWTPHW:325942,300 population served2012
RED LODGE CITY OF STPHW:325252,255 population served2012
MALTA WWTPHW:324872,170 population served2012
EAST HELENA WWTPHW:325572,047 population served2012
W GLENDIVE STPHW:325892,016 population served2012
TOWNSEND LAGOONHW:324912,010 population served2012
CROW AGENCY WWTPHW:325221,970 population served2012
LAKESIDE STPHW:325971,914 population served2012
THREE FORKS STPHW:325351,869 population served2012
PLENTYWOOD LAGOONHW:324861,853 population served2012
LOLO Water and Sewer DistrictHW:325871,813 population served2012
STEVENSVILLE WWTPHW:324961,809 population served2012
CHOTEAU LAGOONSHW:325771,780 population served2012
FORSYTH WWTPHW:324891,777 population served2012
BAKER CITY OF WWTPHW:325311,695 population served2012
BIG TIMBER WWTFHW:324901,650 population served2012
RONAN LAGOONHW:324921,547 population served2012
CHINOOK WWTPHW:325401,500 population served2012
FORT BENTON LAGOONSHW:324881,464 population served2012
SUN PRAIRIE VILLAGE WandS DISTRICTHW:326071,400 population served2012
MANHATTAN WWTPHW:324971,380 population served2012
WHITEHALL WWTPHW:325561,298 population served2012
PABLO WWTPHW:325851,262 population served2012
ENNIS WWTPHW:325001,250 population served2012
EL MAR ESTATES MISSOULA COHW:326171,230 population served2012
ABSAROKEE SEWER DIST RSID 5and7 WWTPHW:325271,200 population served2012
BOULDER WWTPHW:324931,183 population served2012
ASHLAND LAGOONSHW:326111,101 population served2012
EUREKA LAGOONSHW:325591,043 population served2012
SCOBEY WWTPHW:325441,036 population served2012
TREASURE STATE ACRES SEWER DISTHW:326261,030 population served2012
HARLOWTON LAGOONHW:325801,017 population served2012
PLAINS WWTPHW:325751,000 population served2012
PHILIPSBURG WWTPHW:32552970 population served2012
WHITE SULPHUR SPRINGS STPHW:32561939 population served2012
AMSTERDAM_CHURCHILL CTY W and S DISTHW:32610927 population served2012
SUPERIOR WWTPHW:32563881 population served2012
CASCADE WWTFHW:32516871 population served2012
BRIDGER LAGOONSHW:32523824 population served2012
CULBERTSON WWTPHW:32571819 population served2012
HARLEM WWTPHW:32541795 population served2012
SEELEY LAKE SEPTICHW:32599780 population served2012
Tenmile Pleasant Valley Sewer District WWTFHW:32632759 population served2012
BIG SANDY WWTPHW:32582750 population served2012
VAUGHN COUNTY WandS DISTRICTHW:32543718 population served2012
JOLIET WWTPHW:32524714 population served2012
FAIRFIELD WWTFHW:32499708 population served2012
SHERIDAN WWTPHW:32583685 population served2012
WIBAUX WWTPHW:32581650 population served2012
CIRCLE LAGOONHW:32501644 population served2012
ARLEEHW:32604600 population served2012
BELT WWTPHW:32518597 population served2012
EKALAKA WWTPHW:32529550 population served2012
THOMPSON FALLS TOWN OF WWTPHW:32576534 population served2012
LODGE GRASS TOWN OF LAGOONHW:32498510 population served2012
VALIER WWTPHW:32494509 population served2012
BROCKTON LAGOONHW:32572491 population served2012
HOT SPRINGS WWTFHW:32595450 population served2012
JORDAN WWTPHW:32548443 population served2012
ALBERTON LAGOONSHW:32562431 population served2012
CHARLO LAKE COUNTY SEWER DISTHW:32536428 population served2012
HYSHAM WWTPHW:32533410 population served2012
TWIN BRIDGES WWTPHW:32495407 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.