The Sanitary Sewer System is designed to carry wastewater from sinks, showers, and toilets toward regional wastewater treatment plants.

• See the 2025 Sanitary Sewer Rate Schedule.
  
  
• See the 2026 Sanitary Sewer Rate Schedule.
  
  
• Read more about the Sanitary Sewer System.

COH Fixed Charge

Funds routine maintenance and operations and the repair and replacement of aging sanitary sewer infrastructure. 

The fee is based on the customer's number of Equivalent Dwelling Units (EDU). Most residential customers are assigned 1 EDU. 

CWS Fixed Charge

Funds Clean Water Services wastewater treatment facilities, pump stations, infrastructure, and lift stations that serve the City of Hillsboro.

The fee is based on the customer's number of Equivalent Dwelling Units (EDU). Most residential customers are assigned 1 EDU. 

Average Use

This fee is based on the volume of water being used at a property as it typically exits through a drain leading to the sanitary sewer system. For most customers, the fee reflects the average water use between November and April and is adjusted each July for next year’s billing cycle. 

Surface Water Management prevents flooding, enhances water quality, and ensure the health of local rivers and streams. It includes the Stormwater System, which collects, moves, and treats rain and snowmelt before it is released into local waterways. 

• See the 2025 Surface Water Management Rate Schedule.
  
  
• See the 2026 Surface Water Management Rate Schedule.
  
  
• Learn more about the Stormwater System.

COH Fixed Charge

Funds routine maintenance and operations and the repair and replacement of aging infrastructure of the stormwater system. It also funds erosion control, stormwater management facility program, and environmental permit requirements.

The fee is based on the amount of impervious surface area on a customer's property, measure as Equivalent Service Units (ESU). Most residential customers are assigned 1 ESU.

CWS Fixed Charge

Funds the oversight and implementation of the environmental permit requirements. 

he fee is based on the amount of impervious surface area on a customer's property, measured as Equivalent Service Units (ESU). Most residential customers are assigned 1 ESU.

The TUF pays for maintenance and repair of City streets and provides limited funding for sidewalks and bicycle infrastructure improvement projects.

The fee amount is based on the estimated number of roadway trips generated by a property. For residential customers, the fee is a flat rate per dwelling unit. 

• See the 2025 & 2026 Transportation Utility Fee Schedule. 
  
  
• Learn more about the TUF.

This fee is only charged to customers residing in the designated South Hillsboro area to fund the construction of neighborhood and community parks, trails, greenways, and other Parks & Recreation facilities as envisioned in the South Hillsboro Community Plan.

• See the 2025 Community Service Fee Rate Schedule.
   
• See the 2026 Community Service Fee Rate Schedule.
  
  
• Learn more about South Hillsboro.

Service Area

Hillsboro's water service area does not match the City limits. Customers east of Cornelius Pass Road receive water service from Tualatin Valley Water District. The City also provides water-only service to a portion of unincorporated western Washington County.  

Learn more about Hillsboro's water service area or find your water provider.

Rates & Charges

Bill charges cover a customer’s cost-of-service to provide reliable and safe drinking water delivered right to their tap. This includes operation, maintenance, and critical upgrades to the City of Hillsboro’s water system.

Water rates are set by the City of Hillsboro Utilities Commission.

• See the 2025 Water Rate Schedule.
  
  
• See the 2026 Water Rate Schedule. 
  
  
• More Water Rate Information. 

Water Fixed Charge

All customers pay a fixed charge, which funds water system maintenance and service costs. The fixed charge is based on meter size and customer class, and not on the amount of water used by the customer. Most residential customers have a 5/8 inch meter.

Water Use Charge

This fee is based on the actual water use registered by the water meter each month. Water use is measured in 100 cubic feet (ccf). One ccf is equal to around 748 gallons. A typical residential customer uses 8 ccf of water per month.  

Pricing Tiers

For the residential customer class, there are four pricing tiers used to calculate the use charge. Each tier is progressively more expensive to pay for the additional infrastructure needed for delivery and to encourage water conservation.

Water Leaks

Learn how to determine if you have a water leak and what to do.

The Hillsboro Water Department offers support, free home water audits, and a leak adjustment program.