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Pleasanton council mulls options to treat PFAS water contaminants

Original post made on Sep 14, 2020

The Pleasanton City Council made headway on plans to repair a contaminated groundwater well and meet -- if not exceed -- future water quality standards earlier this month.

Read the full story here Web Link posted Sunday, September 13, 2020, 4:49 PM

Comments (17)

10 people like this
Posted by Pamela
a resident of Alisal Elementary School
on Sep 14, 2020 at 10:24 am

Pamela is a registered user.

In view of regular testing and monitoring, why is the high contaminant issue only now being addressed?


8 people like this
Posted by Michael Regal
a resident of Carriage Gardens
on Sep 14, 2020 at 11:35 am

Michael Regal is a registered user.

Are there recommended home filtration systems that can filter out these PFAS?


4 people like this
Posted by Robert Hallett
a resident of Mission Park
on Sep 14, 2020 at 3:48 pm

Robert Hallett is a registered user.

Has anyone contacted East Bay MUD about using there water? In my opinion it’s a higher quality of water.


23 people like this
Posted by BobB
a resident of Another Pleasanton neighborhood
on Sep 14, 2020 at 7:15 pm

BobB is a registered user.

It's a response to new regulations.


9 people like this
Posted by Marco Rodrigues
a resident of Pleasanton Valley
on Sep 16, 2020 at 10:44 pm

Marco Rodrigues is a registered user.

Michael, I addressed this problem at home and documented the process here:

Web Link


1 person likes this
Posted by Michael Regal
a resident of Carriage Gardens
on Sep 17, 2020 at 10:12 am

Michael Regal is a registered user.

Marco!!!!! Fantastic information!!!!!

I've used Savior Plumbing for some projects in my household already. Nothing but great things to say about Savior Plumbing ... they get my highest recommendation.

It didn't jump off the page and I have yet to dig through specs, but do you know definitively that your system is able to filter the PFAS being discussed?

Thanks ... Mike


3 people like this
Posted by LPW
a resident of Another Pleasanton neighborhood
on Sep 17, 2020 at 10:58 am

LPW is a registered user.

Contacted Zone 7 regarding what RO systems to recommend for PFAS removal since I'm shopping for one. This response was sent back to me if you are interested:

This may be helpful in searching for a reverse osmosis system: To find products certified for reduction of PFOA and PFOS by NSF International, visit NSF’s certification listings or contact the NSF International consumer information team at [email protected] or 1.800.673.8010.
Web Link


7 people like this
Posted by Linda Kelly
a resident of Vintage Hills
on Sep 17, 2020 at 2:49 pm

Linda Kelly is a registered user.

Most filters of this type use GAC. Water-speak for Granulated Activated Carbon. Same as your refrigerator filter. Probably too expensive, but not very expensive. Little old ladies like me can change it with minimal effort.
The water delivered to your home has it, so the water coming into your homes is perfectly safe to drink.


4 people like this
Posted by David
a resident of Another Pleasanton neighborhood
on Sep 19, 2020 at 9:42 am

David is a registered user.

GAC is the definite way to go. When I lived in Pitt, our district used these. In my opinion, it's the most efficient way to treat and consume water. But that's obviously up to the council and the professionals who should be informing them.

Web Link


1 person likes this
Posted by Michael Regal
a resident of Carriage Gardens
on Sep 22, 2020 at 10:18 am

Michael Regal is a registered user.

It seems like Pleasanton has a PFAS problem, but so far the recommended websites have talked about PFOS and PFOA ... I'm no expert, so I don't know if these acronyms all imply the same problem. If you find a product that filters PFOS, does that mean it's good for PFAS?

That's not obvious to me, but my natural inclination is to say no. PFAS is different than PFOS. So buying a PFOS product doesn't necessarily guarantee you have mitigated a PFAS issue.

Anyone have some knowledge in this area?


2 people like this
Posted by Linda Kelly
a resident of Vintage Hills
on Sep 22, 2020 at 3:10 pm

Linda Kelly is a registered user.

Michael Regal, PFAS is the larger class of chemicals while PFOA and PFOS are some of the chemicals within that classification or group. Like Pleasanton and Dublin are cities in Alameda County. The National Institute of Environmental Sciences studies show that Granulated Activated Carbon is effective at removing this class of chemicals, as well as lots of other stuff. If you have a fridge filter, it already is that kind of filter. Very common. Simple.

From the FDA, EPA, etc.:

Per- and polyfluoroalkyl substances (PFAS) are a family of human-made chemicals that are found in a wide range of products used by consumers and industry. There are nearly 5,000 different types of PFAS, some of which have been more widely used and studied than others. Many PFAS are resistant to grease, oil, water, and heat. For this reason, beginning in the 1940’s, PFAS have been used in a variety of applications including in stain- and water-resistant fabrics and carpeting, cleaning products, paints, and fire-fighting foams. Certain PFAS are also authorized by the FDA for limited use in cookware, food packaging, and food processing equipment.

From the Minnesota department of Pollution Control:

PFOS – Perfluorooctane sulfonate (PFOS) was the key ingredient in the stain repellant Scotchgard, and was used in surface coatings for common household items such as carpets, furniture, and waterproof clothing.
PFOA – Perfluorooctanoic acid was used in the production of nonstick coatings for cookware. The best known of these coatings, PTFE or Teflon™, is made from PFOA and may contain some traces of PFOA. It was also used in production of carpets, upholstery, clothing, floor wax, and sealants.


Like this comment
Posted by been there
a resident of Del Prado
on Sep 22, 2020 at 3:48 pm

been there is a registered user.

The category of man-made chemicals mentioned here is called Forever Chemicals, because they remain forever in the environment. You might want to read a book called, "Exposure: Poisoned Water, Corporate Greed, and One Lawyer's Twenty Year Battle Against DuPont." by Robert Bilott. The book jacket reads" A little known and unregulated chemical represents the greatest human health crisis of our time. This chemical is inside you and everyone you know. "
The movie version is called "Dark Waters" and there is also a full documentary made by the attorney who successfully sued DuPont for poisoning a community with their toxic PFOS in runoff from a DuPont landfill.
While our situation may not be this drastic, it is wise to investigate all you can from reliable sources so our leaders have support and are not blind-sided by parties that may want to down-play the impact of these Forever Chemicals in our water. We already know they are there. SO stay vigilant, my friends.
If you want to get more information on this topic, EWG.org (Environmental Working Group) has some excellent research reports


9 people like this
Posted by Linda Kelly
a resident of Vintage Hills
on Sep 22, 2020 at 7:34 pm

Linda Kelly is a registered user.

Environmental Working Group is an alarmist group known for misleading reports and fearmongering. It is funded by the organic food industry, and it's biased reports represent that industry's idea that everything must be pure. If you choose to follow Been There's link to EWG, be sure to also follow this link Web Link to read both sides of the story.


Like this comment
Posted by been there
a resident of Del Prado
on Sep 23, 2020 at 10:38 am

been there is a registered user.

Thank you Linda for pointing out the importance of doing your own research. I hope that we can deal with our toxic PFAS and PFOS issue to your satisfaction. It sounds like you are fine with having known toxic Chemicals in your water and the environment. But since you vilify the organic foods "industry", I hope you live well and stay away from the Farmers' Markets.


6 people like this
Posted by BobB
a resident of Another Pleasanton neighborhood
on Sep 23, 2020 at 2:08 pm

BobB is a registered user.

Thank you Linda kelly,

Here is a more scientific, balanced particle on these chemicals.

Web Link


6 people like this
Posted by Linda Kelly
a resident of Vintage Hills
on Sep 23, 2020 at 3:14 pm

Linda Kelly is a registered user.

Thank you, BobB. There are lots and lots of articles regarding the substances. People need to not panic about them, be aware that they're there, but realize the water suppliers are and have been aware so there is no need to fear drinking the water.


Like this comment
Posted by Linda Kelly
a resident of Vintage Hills
on Sep 23, 2020 at 4:42 pm

Linda Kelly is a registered user.

Robert Hallett, EBay Mud presents a logistical problem in getting a distribution system in place to bring the water to the Tri-Valley. East Bay Mud getis its water from the Mokelumne River aquaduct system. Costs involved in constructing a pipeline to join into it would be prohibitively costly, and make not sense to water rates. Look at the geography of the sources and you may gain a better understanding of how it works.


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