The new storm water rates system bills properties based on usage of the storm water system, as represented by impervious area - those areas that do not absorb water.
These impervious areas include:
- Roofs
- Paving
- Sidewalks
- Structures
- Gravel driveways
- Pools
Single and two-family residential properties are placed in one of the following four rate tiers, depending on the square footage of impervious area.
|
Single-Family and Two-Family Residential |
|
Measured impervious area |
|
Quarterly charge |
|
Up to 2,187 square feet |
|
$17.46 |
|
> 2,187 to 4,175 square feet |
|
$25.83 |
|
> 4,175 to 7,110 square feet |
|
$39.79 |
|
> 7,110 square feet |
|
$64.91 |
Commercial and other properties are billed directly on the impervious areas at a rate of $279.10 per acre per quarter, plus a $6.30 customer charge per quarter.
The property image will show the impervious area analysis for the property you have requested. This analysis has primarily been done with a computer, so some errors may have occurred. The following are pervious materials might be interpreted by the computer as impervious:
- Wood chips
- Decks
- Areas in shadows
If you have reason to believe that the impervious area has been incorrectly identified, please take the following steps:
- Print the document
- Identify the areas that have been incorrectly identified as impervious (contrasting pen or highlighter works best)
- Mail the document to:
City of Ann Arbor – Stormwater
Box 8647
Ann Arbor, MI 48107-8647
We will review your revision, and return the results of the analysis to you.
Please remember that if you are a one or two family residential property, you will need to reduce your impervious area by an amount sufficient to enter a lower tier.
For example, if you are currently at 4,775 square feet, you will need to lower your impervious area by 600 square feet (to 4,175) in order to enter a lower tier.
Credits Available
You can take advantage of credits to lower your storm water bill:
Updated October 26, 2007