Protecting Public Health and the Environment.

Variances from Idaho Water Quality Standards

A variance is a temporary relaxation of water quality standards. Variances are granted by DEQ to facilities for specified pollutants in their wastewater based upon a rationale as to why more time is needed to meet the prevailing criteria. The allowed reasons for a variance are the same as for beneficial use changes under a use attainability analysis.

Variances generally last for the duration of a federally issued NPDES permit, usually five years, and may be renewed if reasonable progress toward meeting prevailing criteria has been made. Because variances are temporary, Idaho's process is administrative. The rules governing DEQ's granting of variances can be found in Section 260 of Idaho's water quality standards (IDAPA 58.01.02.260).

Current Variances from Idaho Water Quality Standards

Operator/
Facility
Date
Granted
Pollutants Receiving Water Related Documents
SFCDASD/
City of Page WWTP
06/05/09 Cadmium, Lead, & Zinc South Fork Coeur d'Alene River Page Variance
SFCDASD/
City of Mullan WWTP
06/05/09 Cadmium & Zinc South Fork Coeur d'Alene River Mullan Variance
City of Smelterville/
WWTP
06/05/09 Cadmium, Lead, & Zinc South Fork Coeur d'Alene River Smelterville Variance

Note: South Fork Coeur d’Alene River Sewer District (SFCDASD), wastewater treatment plant (WWTP)


Staff Contacts

Water Quality Standards Lead
Vacant
DEQ State Office
Water Quality Division
1410 N. Hilton
Boise, ID 83706
(208) 373-0502

More Information

Idaho's Water Quality Standards (IDAPA 58.01.02)

Related Pages

Use Attainability Analysis