Clean Water Act discharge permit · NPDES ID0021806

CAMBRIDGE, CITY OF - CAMBRIDGE WWTP, Cambridge, ID: NPDES ID0021806 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
8Pollutants with an effluent exceedance

CAMBRIDGE, CITY OF - CAMBRIDGE WWTP, held by CAMBRIDGE, CITY OF, holds NPDES permit ID0021806, which discharges to Weiser River. EPA’s file records it issued February 14, 2005 and expiring March 31, 2010. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	CAMBRIDGE, CITY OF - CAMBRIDGE WWTP
Permittee as filed	CAMBRIDGE, CITY OF
NPDES ID	ID0021806
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	February 14, 2005
Expiration date	March 31, 2010
Address	Cambridge, ID 83610
Receiving water	WEISER RIVER
Subwatershed	Bacon Creek-Weiser River (HUC 170501240607)
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

12Pollutants on file
10Under a numeric limit
12With a violation of any kind
8With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
BOD, 5-day, 20 deg. C	5	508	71	April 30, 2026	99,999% over the limit
pH	2	186	58	March 31, 2019
BOD, 5-day, percent removal	1	119	44	April 30, 2026	99,999% over the limit
Solids, total suspended	5	205	32	April 30, 2026	126% over the limit
Coliform, fecal MF, MFC broth, 44.5 C	0	162	26	July 31, 2002	99,999% over the limit
Solids, suspended percent removal	1	22	13	April 30, 2026	131% over the limit
Chlorine, total residual	6	136	10	September 30, 2010	390% over the limit
E. coli	2	23	5	March 31, 2019	99,999% over the limit
Flow, in conduit or thru treatment plant	2	86	0
Phosphorus, total [as P]	1	4	0
Nitrogen, ammonia total [as N]	1	2	0
Temperature, water deg. centigrade	0	1	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES ID0021806.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, ID0021806.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID ID0021806 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

The page is a public-records entry for the Cambridge City of Cambridge WWTP, held under NPDES permit ID0021806 and discharging to the Weiser River, with EPA's permit file showing the permit as administratively continued. It lists a minor discharger class, 10 pollutants under a numeric limit, and 8 pollutants with an effluent exceedance, with the permit's issue and expiration dates as recorded in EPA's file.