Post Falls Highway District
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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEMS
 NPDES 

HIGHWAY DISTRICTS PROTECTING CLEAN WATERWAYS OUTREACH VIDEO CLIP
guide: small residential construction sites
​What is an NPDES permit?
​
​The Clean Water Act prohibits anybody from discharging "pollutants" through a "point source" into a "water of the United States" unless they have an NPDES permit. The permit will contain limits on what you can discharge, monitoring and reporting requirements, and other provisions to ensure that the discharge does not hurt water quality or people's health. In essence, the permit translates general requirements of the Clean Water Act into specific provisions tailored to the operations of each person discharging pollutants.
 

guide: large construction sites
How do NPDES Permits protect water?

An NPDES permit will generally specify an acceptable level of a pollutant or pollutant parameter in a discharge (for example, a certain level of bacteria). The permittee may choose which technologies to use to achieve that level. Some permits, however, do contain certain generic 'best management practices' (such as installing a screen over the pipe to keep debris out of the waterway). NPDES permits make sure that a state's mandatory standards for clean water and the federal minimums are being met.
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Do I need an NPDES permit?
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It depends on where you send your pollutants. If you discharge from a point source into the waters of the United States, you need an NPDES permit. If you discharge pollutants into a municipal sanitary sewer system, you do not need an NPDES permit, but you should ask the municipality about their permit requirements. If you discharge pollutants into a municipal storm sewer system, you may need a permit depending on what you discharge. You should ask the NPDES permitting authority.
pfhd jurisdiction: npdes stormwater outfall map
PFHD'S NPDES PERMIT
PFHD ANNUAL Report 2011
PFHD ANNUAL Report 2012
PFHD ANNUAL REPORT 2013
PFHD ANNUAL Report 2014
PFHD ANNUAL REPORT 2015
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PFHD ANNUAL REPORT 2016
PFHD ANNUAL REPORT 2017
PFHD ANNUAL REPORT 2018
pfhd annual report 2019
Copyright © 2021 Post Falls Highway District.  All Rights Reserved.
​5629 E Seltice Way Post Falls, ID 83854
Phone (208) 765-3717 
Fax (208) 765-0493
​Email: contactus@postfallshd.com

Summer Hours: March 29 - October 31  6 am - 4:30 pm | M - TH 
Winter Hours: Nov 1 - April 4 6 am - 2:30 pm | M - F​

Post Falls Highway District is Title VI compliant and Equal Opportunity Compliant.  
Contact the office for more information or special events.
DISTRICT MAP 
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