1478 Cascade Rd, Emmett, ID 83617 · Gem County · Publicly Owned Treatment Works
Emmett WWTP is a publicly owned wastewater treatment works in Emmett, Gem County, Idaho treating an average of 1.76 million gallons per day against a permitted design capacity of 5.7 MGD, serving about 7,647 residents. It discharges under NPDES permit ID0020311 (administratively continued), which expires in January 2007, with 2 recorded violations in the last three years. EPA has recorded 4 formal enforcement actions naming the plant, the latest in August 2017.
One treatment structure or unit process identified at Emmett WWTP.
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See the full treatment train at Emmett WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Federal civil enforcement cases, compliance inspections and informal actions recorded for Emmett WWTP in EPA's ICIS system.
Latest case · Aug 2017
CITY OF EMMETT, IDAHO - WASTEWATER TREATMENT PLANT (WWTP)
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $2.1M
EPA's description of the case:
“On October 25, 2012, Region 10 issued a compliance order by consent to the City of Emmett, Idaho (City) for violations of the City�s NPDES permit (Permit Number ID-002031-1). The facility received a…”
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Source: EPA ECHO, civil enforcement case 10-2013-0008.
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Every action against Emmett WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Decision-makers at Emmett WWTP.
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Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 14, 2026; facility record last updated March 9, 2025.