Wastewater Treatment Plant

The 6.5 MGD (million gallons per day) Borough of Ambler Wastewater Treatment Plant uses trickling filters to treat wastewater from residents in the Borough of Ambler and the Townships of Upper Dublin, Lower Gwynedd, Whitemarsh, and Whitpain. The original was plant designed in 1960 for an average daily flow of 1.5 MGD, then expanded to 3.25 MGD in 1968. An upgrade and expansion for an average daily flow of 6.5 MGD was constructed in the early 1980s. Final treated effluent is discharged to the Wissahickon Creek.

Numerous process improvements have been constructed over the past 30 years, including additional pipes, pumps and valves to treat more wastewater from high flows during storm events as well as upgrades to reduce the quantity of nutrients and chemicals discharged to the creek.




Preliminary treatment to remove grit and screenings (rags, flushable wipes, etc.) became operational around 1995. These units help prevent clogging of pumps and pipes.



Gas chlorine was used to disinfect the effluent, with sulfur dioxide added to reduce the chlorine discharged to the creek. In 1999, these two chemicals were replaced with an ultra-violet (UV) light disinfection system.




In 2000, forced air ventilation was installed at the trickling filters to improve treatment performance and to reduce odors.



In 2002, Dissolved Air Flotation was installed for final clarification and to remove Phosphorus from the wastewater. The Borough received a $100,000 Pennsyvania Department of Environmental Protection Growing Greener Grant for this project.

Add/Remove/Update Your Contact Information

Ambler Main Street & Other Special Events

all-day E A G L E S Town Tailgate Party! @ Ambler
E A G L E S Town Tailgate Party! @ Ambler
Jan 20 all-day
Wear your EAGLES Green and join us for our town wide tailgate party – there will be plenty of prizes, giveaways, food, beverages and specials! Main Street Vintage – a tailgate basket give away and have special[...]
all-day Ambler Restaurant Week – January...
Ambler Restaurant Week – January...
Jan 29 – Feb 5 all-day
Ambler Restaurant Week – January 29-February 5, 2018
Ambler Restaurant Week is back and better than ever, January 29-February 5th! Ambler area restaurants will be offering wonderful specials and prix-fix menus. Whether you’re looking for high end or casual, a beverage pairing or a[...]
all-day Ambler Awards Weekend
Ambler Awards Weekend
Mar 2 – Mar 4 all-day
Ambler Awards Weekend
Ambler is celebrating the Academy Awards with a 3 day Awards Weekend kicking off Friday, March 2nd and culminating with a spectacular party and viewing of the 2018 Academy Awards at the Ambler Theater on Sunday,[...]