Cambridge WWTP
195 E Central Blvd, Cambridge, ID 83610 · Washington County · Publicly Owned Treatment Works
- Average flow
- 0.11 MGD
- Design flow
- 0.25 MGD
- NPDES permit
- ID0021806
- Administratively continued
- Permit expires
- August 2025
- Population served
- 335
- CWNS 2022
Cambridge WWTP is a publicly owned wastewater treatment works in Cambridge, Washington County, Idaho treating an average of 0.11 million gallons per day against a permitted design capacity of 0.25 MGD, serving about 335 residents. It discharges under NPDES permit ID0021806 (administratively continued), which expires in August 2025, with 21 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in August 2024.
Treatment technology
2 treatment structures and unit processes identified at Cambridge WWTP.
Available with a free Klarifi account
See the full treatment train at Cambridge WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 21
- Effluent violations
- 21
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Cambridge WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Penalties assessed
- $638
- all cases
- Compliance actions
- $5,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Aug 2024
CITY OF CAMBRIDGE POTW - ESA (CWA NPDES)
Administrative order · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $638 · Compliance actions $5,000
EPA's description of the case:
“On August 7, 2024, Region 10 filed an expedited settlement agreement resolving CWA violations at the City of Cambridge Wastewater Treatment Plant located in Cambridge, Idaho. Alleged violations…”
Unlock EPA's full description by creating a free account on Klarifi. Create a free account →
Source: EPA ECHO, civil enforcement case 10-2024-0133.
Full case history with a free Klarifi account
Every action against Cambridge WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Cambridge WWTP.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Idaho
Council · 15 mi away
0.33 MGD
Weiser · 27 mi away
0.87 MGD
Cascade · 32 mi away
—
New Meadows · 34 mi away
0.92 MGD
Mccall · 36 mi away
—
Payette · 36 mi away
0.84 MGD
Payette · 38 mi away
0.7 MGD
Fruitland · 40 mi away
—
Cambridge WWTP: frequently asked questions
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 October 26, 2026; facility record last updated November 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms