Click to Home
Email PagePrint


Go To Search
Emergency Alert

Public Service

Stormwater
Flooding Update
Flood map from cisa.sc.edu
With historic rainfall this past year (over 5' of rain for the entire year) we continue to experience flash flooding during small rain events.  Quite simply, the ground is so saturated that rain cannot soak in and we experience instant run-off. 

Mount Pleasant recorded over 26.88"  during the October event at the same time as we experienced very high tide cycles (8.29').  For rainfall totals alone, this event was considered to be over the 1,000 year event.  For information and graphics on the event totals and impact please click HERE!

Town staff continues to conduct inspections and maintenance of the public drainage systems, our immediate goals to ensure your safety and to continue our services are;
  • to identify systems that may have structural concerns
  • to identify systems that may have cleaning needs
  • to secure infrastructure with damage until repairs can be made
  • to clean and repair the public drainage system

Staff continues to prioritize all calls as they are received and making inspections of calls and our systems.  Recovery may take time but we will get our systems functional as quickly as possible. You can help us be keeping drains and ditches clear of debris!

Staff is working with FEMA to repair infrastructure that was damaged while still working on scheduled projects.  With increased call volumes some work may take a bit longer - but we will get there! - Thank you in advance for your patience.


Mosquito Information
Just say NO-  Mosquitos!
With warmer weather not only signals pollen and spring flowers but soon the mosquitos too will be in full bloom!  Because of the historic rainfall and high ground water tables many of our drainage ditches - and protected wetlands have water in them. 

Our ditch maintenance crew is working hard to make sure that the main canals are clear so that the water can flow.  Many of our ditch systems are "flat" and we are not able to drain them.  Wetlands are supposed to have water in them and we cannot drain them - but both systems usually have beneficial mosquito eating insects, frogs and fish populations!

Local Mosquito Control
Local mosquito control is managed by Charleston County.  Please visit the Charleston County Mosquito Control website for information on aerial spraying, to report mosquito swarms, and obtain other mosquito related information.  They can also be contacted at (843)202-7880.

Zika Virus
Staff continues to monitor information about the Zika virus.  For the latest information please visit the Centers for Disease Control (CDC) website.

Stormwater is...
Stormwater is the rainfall that is not absorbed by the ground.   Stormwater that does not soak into the ground becomes surface runoff, which either flows directly into surface waterways or is channeled into storm sewers, which eventually discharge to surface waters.  It does not flow to a treatment plant.

Stormwater is of concern for two main issues: one related to the amount of rainfall and how quickly the rain comes (flood control and water supply) and the other related to potential contaminants that the water is carrying, i.e. water pollution.

Funding Infrastructure Maintenance with a Utility
Direct and Indirect Benefits
There are direct and indirect benefits from the stormwater program. Not everyone receives a direct benefit at their doorstep. The fee does not guarantee a direct service to your property but represents a collective effort to resolving issues and problems across the town through a reasonable and timely process. We all receive an indirect benefit from the storm drain systems that provide safe roadways, protect our homes, and protect the environment.

Managing Stormwater
No storm drains or flooding problems on your street? Bet your home has impervious surfaces such as the roof and the driveway that increase the amount of stormwater runoff and decrease the amount of natural environment that is available to absorb stormwater!  Perhaps you travel to nearby shopping centers, walk on sidewalks or use bike lanes - these amenities also remove natural areas that collected and filtered stormwater.  The development of land creates stormwater runoff that needs to be managed.

The loss of these natural areas area to impervious surfaces means that storm water is not absorbed quickly enough in to the ground by the remaining areas. The increased amount of water flows above ground until it can be collected.  This water needs to go somewhere and the systems that take it away need to be maintained. Every resident and business contributes to stormwater runoff because of the development of our property and the roads and businesses that we need and use in our everyday activities.  Everyone may contribute pollution to the system as well, either from our homes and businesses or as we travel around the Town.

Flood Control
Flood damage costs are an expense for the entire community, not just the flooded resident or business. The Town participates in the National Flood Insurance Program and the Community Rating System  to help keep the costs of flood insurance down for our residents. Through the performance of certain required activities the Town has been awarded a rating that gives our residents, who have flood insurance, the indirect benefit of a % cost reduction in flood insurance.

Water Quality
The Clean Water act of the 1970’s, requires that the Town implement programs to help improve water quality in our surrounding waterways. Funding will be required to implement new programs and conduct pollution reduction and protection activities. Much of the pollutants found locally are associated with our everyday activities. As we develop the area around us, we create more pollution and we stress our natural environment. These problems will be addressed and managed through a long-term program.  Please visit our water quality pages for additional information!