How stormwater fees work and what property owners pay for

Rainfall becomes stormwater when it flows across roofs, driveways, streets, parking areas, and other hard surfaces. Unlike water that soaks into soil, this runoff travels toward gutters, drainage inlets, channels, detention areas, and other parts of a municipal drainage system.

A stormwater fee is a charge used to fund that system. It helps a city inspect and maintain drainage facilities, manage runoff, reduce flooding, protect water quality, and meet regulatory requirements. The charge is generally connected to a property’s contribution to runoff rather than the amount of water used indoors.

Property owners who want local information about utility services, infrastructure programs, rates, and contacts can visit Susanville Public Works. The department’s current notices and policies are the best source for local billing rules and project information.

What the fee pays for

Stormwater revenue supports the public facilities that collect, transport, treat, and discharge rainwater. Typical expenses include cleaning catch basins, repairing storm drains, maintaining culverts, controlling erosion, clearing debris, and inspecting drainage structures before and after major storms.

The fee may also support engineering studies, flood prevention projects, water-quality monitoring, public education, and compliance with state or federal stormwater permits. These activities are separate from drinking-water treatment and wastewater collection, even though all three services may appear on the same municipal bill.

How the charge is calculated

Cities commonly calculate a stormwater utility charge by estimating how much runoff a parcel can generate. The most important factor is usually impervious area, meaning surfaces that prevent or limit water from soaking into the ground. Buildings, paved driveways, sidewalks, patios, parking lots, and similar surfaces may be included.

A municipality may use a flat rate, a property-size classification, an estimated impervious-area measurement, or a combination of these methods. Some systems assign each parcel an equivalent residential unit, often called an ERU, and charge residential properties according to a standard average. Commercial, industrial, institutional, and multifamily parcels may receive a more individualized assessment.

The general calculation can be expressed as:

Stormwater fee = applicable rate × billing units

Billing units might represent a parcel category, an ERU, or a measured amount of impervious surface. The actual rate and unit definitions come from the city’s adopted ordinance, rate schedule, or utility billing policy.

Property features that affect runoff

Lot size alone does not always determine the fee. A large property with extensive landscaping may produce less rapid runoff than a smaller parcel covered by a roof and pavement. For this reason, some stormwater programs focus on developed surface area rather than total acreage.

Drainage patterns can matter as well. A property with a private detention basin, infiltration system, rain garden, or other approved control may manage some runoff before it reaches the public system. Whether those features reduce a bill depends on local rules, documentation, inspection requirements, and the level of public benefit they provide.

The following examples show how different billing approaches can produce different results:

Property or billing method	Typical basis	How the charge may be applied
Single-family home	Standard residential unit	One fixed monthly or annual amount
Multifamily property	Number of units or measured runoff area	Base rate adjusted for site characteristics
Commercial parcel	Impervious surface or ERUs	Rate multiplied by assigned billing units
Vacant or lightly developed land	Parcel classification or runoff contribution	Lower charge where local rules allow
Property with approved controls	Standard assessment, possible credit	Reduction only if the program authorizes it

Stormwater fees and other utility charges

A stormwater fee is different from a water-use charge. Water service is usually based on metered consumption, while stormwater billing is generally based on land use and runoff potential. A property can have low indoor water consumption and still create substantial runoff from roofs and paved areas.

The fee is also distinct from wastewater charges. Wastewater rates commonly reflect the volume of water sent into the sanitary sewer system, while stormwater charges fund surface drainage. Keeping these purposes separate helps explain why a bill can include several infrastructure services with different calculation methods.

Stormwater charges may appear as a separate line item on a utility statement or as part of a broader municipal services bill. The billing frequency, exemptions, effective date, and appeal process are determined locally, so property owners should review the current Susanville rate information rather than rely on a formula from another city.

Reviewing a bill or property assessment

Start by identifying the line item used for drainage, stormwater, or surface-water management. Then check whether the bill lists a rate, billing unit, property classification, or adjustment. Comparing the current statement with a prior bill can help reveal whether a change resulted from a new rate, a parcel reclassification, or a revised account record.

If the charge appears inconsistent with the property’s use, collect supporting information such as the parcel address, assessor or account number, site plans, and photographs of drainage improvements. Questions about a municipal assessment should be directed to the department or billing office identified in the city’s official contact information.

A correction request does not automatically remove a fee. In many systems, the owner must demonstrate that the parcel was classified incorrectly or that an approved credit standard has been met. Local procedures may include a written review, an engineering assessment, or an appeal deadline.

Practical ways to manage runoff

Private drainage improvements may reduce localized ponding and protect buildings, even when they do not change the municipal charge. Owners should keep roof gutters, downspouts, driveway drains, and private inlets clear of leaves, sediment, and debris. Water should be directed away from foundations and toward an approved discharge point.

Useful steps include:

• Maintain gutters, downspouts, swales, and private drainage inlets.
• Use permeable surfaces or landscaped areas where site conditions and local rules permit.
• Keep trash, soil, oil, and yard waste out of streets and storm drains.
• Ask the city whether credits, exemptions, or runoff-control programs are available.
• Report blocked public inlets, damaged drainage structures, or flooding through the city’s designated service channels.

These actions can reduce property damage and limit pollutants entering local waterways. They should be designed carefully in areas with freezing conditions, steep slopes, expansive soils, or limited infiltration. Public works staff or a qualified drainage professional can help determine whether a proposed improvement is suitable.

A stormwater fee is a way to distribute the cost of maintaining shared drainage infrastructure. Understanding the billing unit, rate, property classification, and available review process makes the charge easier to evaluate. Check the latest city rate information, keep private drainage features maintained, and contact Susanville Public Works when a billing or infrastructure concern requires an official response.