MS4 Stormwater Program
What is an MS4?
MS4 stands for Municipal Separate Storm Sewer System. MS4s are conveyances or systems of conveyances including roads with drainage systems, municipal street, catch basins, curbs, gutters, ditches, man-made channels, or storm drains that are owned or operated by a public entity, are designed or used for collecting or conveying stormwater, and are not a combined sewer or part of a publicly-owned treatment wastewater treatment plant.
A Municipality is bound by the US Environmental Protection Agency (EPA) regulations associated with the Federal Clean Water Act for MS4s when all or a portion of a municipality lies within an urbanized area (UA), as determined by the US Census Bureau. Approximately 25% of West Earl Township is considered urbanized area.
MS4 Program
In Pennsylvania, the MS4 program is managed by the Pennsylvania Department of Environmental Protection (PADEP). The PADEP has provided a streamlined process for Municipalities to meet State and Federal stormwater requirements. Operators of an MS4, such as West Earl Township, must obtain a National Pollutant Discharge Elimination System (NPDES) permit and develop and implement a stormwater management plan (aka MS4 Program). Mandatory elements of the stormwater management plan include 6 minimum control measures (MCM); each MCM has a number of associated Best Management Practices (BMPs). These 6 MCMs include public education and outreach, public involvement and participation, illicit discharge detection and elimination, construction site runoff control, post-construction stormwater management and pollution prevention and good housekeeping.
Why Is Stormwater Regulated?
The MS4 program requires municipalities to implement a series of programs to reduce the discharge of pollutants from the storm sewer system in a manner that protects water quality. Water quality standards are set by the State of Pennsylvania. These standards seek to protect the waters for aquatic life, water supply, recreation and fish consumption, and areas that need special protection. The MS4 program focuses on managing discharges into the waters of the Commonwealth by educating and implementing proper control measures and best management practices some of which are outlined below.
Minimum Control Measures & Best Management Practices
MCM #1 – Public Education and Outreach. The goal of this MCM is to educate the public about stormwater activities. It aims to build greater support for the MS4 program, increase compliance, and promote environmental awareness in the local community. West Earl Township regularly makes efforts to keep Township residents informed about stormwater management and stormwater runoff pollution by publishing articles in newsletters, and on the Township’s website and Facebook page.
MCM #2 – Public Participation and Involvement. The goal of public participation and involvement is to involve the public in stormwater activities such as workshops, adopt-a-drain program and any opportunities to volunteer. West Earl also encourages residents to attend any public meetings where the MS4 program will be discussed.
MCM #3 – Illicit Discharge Detection and Elimination. An illicit discharge is any discharge to an MS4 that is not composed entirely of stormwater (with some exceptions). These discharges can include wastewater, effluent from septic tanks, oil, dog waste, pesticides, and household toxics. These pollutants can make their way directly to our waterways untreated and are dangerous to the public and environmental health. The Township currently has a written Illicit Discharge Detection & Elimination as part of its MS4 program requirements. This plan includes procedures for detecting illicit discharges and the methods to mitigate any potential pollution. Township residents are encouraged to report illicit discharges by either calling the Township office or filling out the form that’s provided under the Illicit Discharges link.
MCM #4 – Construction Site Runoff. The goal of this MCM is to protect our waterways from stormwater-related pollution that can result from construction activities. West Earl Township relies on the PADEP to help meet some of the requirements for this MCM.
MCM #5 – Post-Construction Stormwater Management. The of goal of the Post-Construction Stormwater Management MCM is to avoid increased stormwater runoff problems and pollution that often accompanies the development of land and the associated increase in impervious surfaces. As with MCM #4 West Earl Township relies on the PADEP to help meet some of the requirements for this MCM.
MCM #6 – Pollution Prevention/Good Housekeeping. The goal of this MCM is to help ensure a reduction in the amount and type of pollution that is generated from municipally-owned and maintained facilities and eventually discharged into local waterways. West Earl Township has developed and implemented an Operation and Maintenance Plan (aka Good Housekeeping Plan) for all its municipal operations and facilities. The Operation and Maintenance Plan includes practices, policies and procedures to reduce or prevent pollutant discharges in the MS4 such as removing maintenance-area floor drains and proper disposal of street sweeping debris. Also included in this MCM is employee training that addresses appropriate topics to further the goal of preventing or reducing the discharge of pollutants from municipal operations.
What are Best Management Practices (BMPs)?
Best Management Practices (BMPs) are important, because they can provide some actions that can be taken by the Municipality or individuals can take to help reduce or prevent stormwater pollution. There are two types of BMPs – structural and non-structural. Structural BMPs are engineered systems that are designed to mitigate the impacts of stormwater. Some examples of structural BMPs include, infiltration trenches, rain gardens and bio-swales. Structural BMPs are effective tools for stormwater management in development. Non-structural BMPs focus on prevention of stormwater generation, therefore effectively reducing runoff volume, and decreasing development costs while increasing property value and marketability. Some examples include protecting riparian areas and wetlands and reducing impervious coverage.
Below are several links to educational brochures and websites where you can find useful information about stormwater management and the Township's MS4 program.
- NEW - Homeowner's Guide to Best Management Practices, Operation & Maintenance
- Adopt-a-Drain Program
- Chesapeake Bay Pollutant Reduction Plan
- Illicit Discharges and Connections
- Illicit Discharge Complaint Form
Annual Reports
- MS4 Program Annual Report 2022/2023
- MS4 Program Annual Report 2021/2022
- MS4 Program Annual Report 2020/2021
- MS4 Program Annual Report 2019/2020
- MS4 Program Annual Report 2018/2019
- MS4 Program Annual Report 2017/2018
- MS4 Program Annual Report 2017/2018 - with all supporting documents
- MS4 Program Annual Report 2016/2017
- MS4 Program Annual Report 2016/2017 - with all supporting documents
- MS4 Program Annual Report 2015/2016
- MS4 Program Update May 1, 2016 - April 30, 2017
Websites
- Cocalico Creek Watershed Association
- Conestoga River Club
- Lancaster County Conservation District
- National Resources Conservation Center
- Pennsylvania Watersheds
- Lancaster County Clean Water Consortium
- Lancaster Clean Water Partners
- Lancaster County Watersheds
- Lancaster County Conservancy
- United States Environmental Protection Agency
- Chesapeake Stormwater Network
- Chesapeake Bay Program - Take Action!
- Create a Rain Garden
Agriculture
- USDA - Manure Management
- PA DEP - Manure Management
- Chesapeake Bay Program and Agriculture
- Lancaster Farmland Trust
For Kids
- Freddy the Fish teaches about stormwater (video).
- Stormwater Sentries - A Facebook Game developed by the Chesapeake Bay Program.
- Penn State Center for Green Infrastructure - Links to stormwater educational games and videos for children of all ages.
Fact Sheets
- Stormwater & Water Pollution - A Summary
- Improving Your Property? - A Do's and Don'ts Guide
- Landscaping Maintenance
- Mowing Guidance
- Draining a Pool
- Illegal Dumping
- Pathogens and Our Waterways
- Winter Maintenance: De-Icing
- Maintaining your BMPs
Brochures and Articles
- What Are Stormwater Pollutants
- Why Should I Care About Stormwater
- Is Stormwater Damaging My Property
- How Can I Control Stormwater On My Property
- How Can I Be A Good Stormwater Neighbor
- Melting Snow: It's Stormwater Too!
- Point Source and Non-Point Source Pollution...What's the difference?
- Stormwater BMPs - What are they & what do they do?
- The Chesapeake Bay in Lancaster County
- Homeowner's Guide to Stormwater BMP Maintenance
- Backyard Conservation
- Make Your Property Bay Friendly
- The Drop You Drink is More Thank You Think
- Fence 'Em Out
- Build Your Own Rain Barrel
- After the Storm
- Lancaster County Watershed Basics
- Solution to Pollution
- Homeowner's Guide to Stormwater