Welcome to the MSD’s STORMWATER CAPITAL RATE ESTIMATOR

DISCLAIMER: This online tool allows users to look up what monthly charge a property may have if the Stormwater Capital Rate is approved by voters. It is for informational purposes only. Do not rely on this data to determine legal property boundaries. Rates shown are estimates based off of information gathered by aerial imagery taken in 2012. Updates to the information provided to MSD by third parties such as St. Louis County may cause this information to change. New aerial imagery will be used to gather updated impervious surface data if voters approve the Stormwater Capital Rate. If your property has changed since this imagery was taken in 2012, the rate shown may not be accurate.

CALCULATIONS: Impervious surfaces do not absorb water. Impervious surfaces include buildings, sidewalks within the property boundary, driveways, parking lots, and patios. An impervious surface area equal to 2,600 square feet is defined as one Equivalent Residential Unit (ERU).

Nonresidential and multifamily residential property rates are calculated based on the number of ERUs on the property (rounded to the nearest whole number), times the rate of $2.25 per month. For instance, a business with 4,800 square feet of impervious area on a parcel would have 1.8 ERUs, rounded to 2 ERUs, and be billed $4.50 per month for that parcel. There is a minimum charge of $2.25 per month for any parcel with greater than 200 square feet of impervious area.

Single family residential property rates are calculated based on 4 rate tiers. 200 to 2,000 square feet of impervious area on a parcel will be charged $1.42 per month. 2,001 to 3,600 square feet of impervious area on a parcel (most residential properties) will be charged $2.25 per month. 3,601 to 6,000 square feet of impervious area on a parcel will be charged $3.74 per month. Over 6,000 square feet of impervious area on a parcel will be charged $6.84 per month.


ACKNOWLEDGEMENT:To continue, click on the “I accept” button to indicate your UNDERSTANDING and ACCEPTANCE of the limits to the accuracy of this information, as noted above.