Sewer Emergency Contact Information


In case of a sewer emergency, contact Dave Lewis at 303-619-7692 or Adrian Gibson at 303-834-5701

How Niwot Sanitation District calculates sewer charges.


The explanation of how Niwot Sanitation District calculates charges. 

Per the rules and regulations, the District charges a flat rate based on number of taps regardless of type of dwelling or facility - condo, single family home, industrial complex, etc. Wastewater cannot be metered like water due to the nature of sewage (toilet paper, solids, etc.). Therefore, we use the industry standard to assume the amount of wastewater discharged from homes, which has been studied for decades. Essentially, the industry standard for a single-family residence is 2.54 people per home with an average daily wastewater discharge of 60-70 gallons per day.  If we multiply 2.54 people per home by the assumed 65 gallons per day, this equates to 165.1 gallons per day discharged to the sewer from one home. Since bills are completed monthly in most cases, 165.1 gallons per day x 30 days = 4,953 gallons per month.  The Niwot Sanitation Rules and Regulations allows homes to discharge up to 7,800 gallons per month using a single tap, which is more than the industry standard allows for.

Based on this information, each tap is charged the same fee for 7,800 gallons per month regardless of the size of the unit, home, or industrial building provided they do not exceed 7,800 gallons per month. If they do exceed this amount, they must purchase another tap.

Wastewater Treatment Plant (WWTP) Improvements Fact Sheet


Wastewater Treatment Plant (WWTP) Improvements Fact Sheet

The Niwot Sanitation District’s (NSD) existing plant needs to be replaced due to aging equipment and a new discharge permit which requires additional treatment processes to protect the environment and the discharging stream. NSD must obtain a loan to complete the capital construction. To service the debt, NSD must increase the sanitary sewer user rate.  Effective immediately, District fees will be raised from $35.50 to $99 monthly, billed every other month at $198.


  • Given the age of the existing equipment and its inability to meet stringent new effluent limits, significant upgrades are necessary for the WWTP. 
  • The WWTP must meet new regulations January 1, 2026. 
  • Fines for non-compliance are up to $10,000 per day.
  • NSD has maintained low rates for its customers for over 30 years due to minimal capital improvements at the plant. During that time, the District prudently built its financial reserves and has over $9 million. 
  • Prior to the inflation, labor shortages, and supply chain interruption of 2020, the District’s reserves were thought to be adequate for upgrading the plant to meet new regulations.
  • Construction costs have risen drastically in recent years and continue to rise, forcing the District to explore additional funding sources.


  • JVA, Inc., of Boulder, was hired as the consulting engineering firm to work with the Board in designing the new plant.
  • Initially, JVA and the Board pursued funding from Colorado Department of Public Health and Environment (CDPHE) State Revolving Fund (SRF) program, which has a subsidized low interest rate.
  • However, in September 2023, the SRF was drastically reduced for 2024.  Funds are now earmarked for disadvantaged communities. Niwot does not qualify. 
  • The Board had approved a smaller rate increase before finding out SRF would not be available. As a result, the public notification of the increase was delayed. 
  • The Board began exploring alternative funding through the United States Department of Agriculture (USDA) as well as through the private bond market. 
  • Correspondence was also sent to Representative Joe Neguse and Senators John Hickenlooper and Michael Bennet requesting assistance through federal funding. No responses have been received yet.
  • The Board consulted with Hilltop Advisors, a fiduciary and private bond brokerage company, and reached the conclusion that fees would need to be raised from $35.50 to $99 monthly, billed every other month at $198, to cover a 1.25 debt service ratio over a 30-year revenue bond coverage period.
  • The Board is progressing with SRF required application steps in case SRF funds are available with a lower interest rate.


  • The Niwot Sanitation District owns and operates a Wastewater Treatment Plant and is responsible for the collection and treatment of sewage from the Niwot community.
  • Monthly fees currently fund collection system maintenance and repairs, operation of the plant, capital improvement savings, and administration.   
  • The NSD is not a governmental agency and does not receive additional funding from property taxes as neighboring communities do. 
  • The monthly fees have been extremely low in comparison to other communities that fund operations and maintenance from sanitary sewer user fees. 
  • Niwot Sanitation District has minimal opportunities for future tap fees from new connections; therefore, improved infrastructure must be funded with user rates.
  • NSD customers can donate to community members who need assistance with user fees.  Please contact the office at the number below if interested.   


  • The District is managed by a board of five elected Niwot community members. 
  • The Board meets monthly to discuss district strategy, review plant operations and compliance with environmental regulations in accordance with its Discharge Permit issued by the Colorado Department of Public Health and Environment. 
  • Meeting dates and agendas are posted on the District’s website and are open to the public.


Contact Information:

Niwot Sanitation Office

7395 North 95th Street

Niwot, CO 80504

Office Phone: 303-652-2525

Website: https://niwotsd.colorado.gov/


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