Wastewater Management

Challenges of Keeping our Water Clean

With a year-round population of about 1000 residents, Block Island's population in the summer swells to over 20,000 persons. The Island's water resources consist of a designated Sole Source Aquifer, coastal embayments, drinking water reservoirs, freshwater wetlands and ponds which are all vulnerable to contamination. The Island is a popular eco-tourism destination, and the strength of the local economy depends on the health of the water resources and the unique natural areas. Appropriate on-site wastewater treatment is essential to prevent pathogens and nutrients from harming the potable water supply and to maintain recreational and commercial fishing, shell fishing, boating, and swimming.

The Code Appendix E Zoning Ordinance Section 506 - Onsite Wastewater Treatment Systems (OWTS) Link -

https://ecode360.com/36750594#36750594

The Code Chapter 19 Utilities Article IV - Onsite Wastewater Treatment Systems Link -

https://ecode360.com/36716981#36716981

RI DEM Wastewater Treatment System (OWTS) Search Link -

https://www.ri.gov/DEM/owts/permits

Helpful Hints:

Filter Maintenance for Conventional Septic Systems - clean filter annually if property is rented and bi-annually if property is not rented. How to videos are available on the internet.

How to clean the effluent filter: 

*Be sure that you are completely covered and wear safety glasses and gloves.

1. Remove septic tank covers

2. Remove the effluent filter from the second compartment

3. Spray the effluent filter with a garden hose over the first compartment to remove all residue from the filter.

4 Replace the filter into the 2nd compartment and secure covers.

5. Clean up area and make sure you remove the contaminated clothes and wash your hands.

6. Failure to properly maintain the filter can cause the system to back up into your home.

Treatment Level Zones

The Treatment Zones document located below depicts parcel boundaries overlaying the Resource Protection Areas (including Great Salt Pond and Water Supply watersheds) and the treatment level zones. These zones are delineated based upon a combination of factors, including soil type and resource protection area.

Financial Assistance:

Click on the links under Related Documents section below for assistance applications for your Sewer Tie-In or Wastewater (Septic) treatment system.