Posted on Thursday February 18, 2021
The Riverhead Water District has been issued a deferral from the New York State Department of Health. When a public water system is issued a deferral, the water system agrees to schedule corrective action in order to comply with a new Maximum Contaminant Level (MCL). In exchange, the Health Department agrees to defer enforcement actions, such as assessing fines, if the water system is meeting the established deadlines for treatment installation. Riverhead has received this deferral for PFOS and PFOA and is in the process of designing and installing Granular Activated Carbon filters (GAC) to remove these compounds from our one well that is impacted by them. The concentrations of one of these compounds with in well 5-1 have been detected above the new 10 ppt drinking water standard. This well has and will continued to be operated only when it is blended with another well on the same site. Well 5-1 has always been blended with another well due to detections of naturally occurring Manganese. The blended water produced from these two wells does not exceed the new 10 ppt drinking water standard for PFOS and PFOA. While blending is an acceptable method of treatment for these compounds, the Water District will install and operate filters to remove these compounds from well 5-1. The status of this deferral and the District’s corrective action will be updated quarterly on our web site.The Riverhead Water District purchases water from SCWA on the west side of our service area and sells water to SCWA on the east side of our service area. Our customers should know that SCWA has pursued a similar state deferral for both PFOA/PFOS and 1,4 Dioxane.
RWD’s deferral notice can be reviewed at the following link: https://www.townofriverheadny.gov/files/documents/PFOAPFOSNOTICE1501112445020421AM.pdf
Our customers should also check the SCWA website at https://www.scwa.com/emerging-contaminants/ for information on the status of the Authority’s deferral and quarterly reports.