The purpose of this post is to update our residents on the current status of the public water in Chalfont Borough, related to the presence of PFCs in the groundwater. Aqua PA provides all Chalfont Borough residents with public water. They have provided us with the information below, relative to Chalfont Borough water.
The U.S. Environmental Protection Agency (EPA) identifies the contaminants to regulate in our drinking water, and they set regulatory limits for amounts of certain contaminants. Aqua uses the EPA’s maximum contaminant levels to ensure water quality.
There are some contaminants for which the EPA develops health advisories that do not have set regulatory limits. The health advisories provide technical information on health effects. PFOA and PFOS are included in those contaminants that have no regulatory limit but are associated with a health advisory. These chemicals are among a family of manmade chemicals that have been used for decades as an ingredient to make products that resist heat, oil, stains, grease and water, and in products for firefighting at airfields. They are extremely resistant to breaking down in the environment.
In 2009, EPA published provisional health advisories for PFOA and PFOS. At the time they were established, these advisories were as follows; PFOS: 200 parts per trillion, and PFOA: 400 parts per trillion. In May 2016, EPA replaced the 2009 provisional advisories with new, lifetime health advisories that combined the two chemicals and set a 70 parts per trillion health advisory level for both.
Chalfont Borough will continue to keep residents informed via this page as we receive information from Aqua PA. All questions should be directed to Aqua PA at 877-987-2782.
You can visit their website at https://www.aquaamerica.com/our-states/pennsylvania.aspx.
The following links may be helpful:
2015 Aqua PA Water Quality Report for Chalfont Borough
EPA’s factsheet on the PFOA and PFOS health advisory levels:
Home Water Treatment Technologies
Home water treatment technologies fact sheet statement from the EPA states that:
“Home drinking water treatment units are typically certified by independent third party organizations against American National Standards Institute (ANSI) standards to verify their contaminant removal claims. Some home filters remove impurities using activated carbon and reverse osmosis, which are the same technologies utilized by public water supply systems to remove PFOA and PFOS. However, there currently are no ANSI protocols for testing home treatment systems to verify that these devices effectively remove PFOA and PFOS or how frequently the filters should be changed in order to maintain removal efficiency. NSF International is currently developing such protocols.” See page 3 at: https://www.epa.gov/sites/production/files/2016-05/documents/drinkingwaterhealthadvisories_pfoa_pfos_5_19_16.final_.1.pdf.
EPA’s discussion on home treatment options on page 65 at: https://www.epa.gov/sites/production/files/2016-05/documents/pfoa_health_advisory_final_508.pdf.
Minnesota study to evaluate home point of use treatment devices. This report notes that both activated carbon (AC) and reverse osmosis (RO) treatment technologies have the ability to effectively reduce PFAS in water (note, the detection limit achievable at the time of this 2008 study was higher than is feasible now): http://www.health.state.mn.us/divs/eh/wells/waterquality/poudevicefinalsummary.pdf
2015 journal article by Anumol et al at: http://www.awwa.org/publications/journal-awwa/abstract/articleid/53620391.aspx shows removal of significant amounts of organic contaminants in drinking water (including PFOS and PFOA) with the point of use devices they tested, which included three pitcher and two refrigerator devices (Brita, PUR, ZeroWater, GE, and Whirlpool).
Updated: March 6, 2019