Serving Rose Valley

Nestled in Delaware County’s historic Arts and Crafts community, Rose Valley Borough represents one of Southeastern Pennsylvania’s most distinctive neighborhoods. This intimate enclave of approximately 1,200 residents combines century-old architectural charm with modern expectations. With homes dating back more than a century—many built before lead was banned from plumbing in 1986—Rose Valley homeowners understand that protecting these historic properties requires vigilance, particularly when it comes to water quality.

For over 25 years, Dierolf Plumbing & Water Treatment has served as the trusted water quality expert throughout Southeastern Pennsylvania. With more than 1,000 five-star reviews, our team of Licensed Master Plumbers and Licensed Well Inspectors brings deep local knowledge to every consultation. We understand the unique challenges facing Rose Valley’s historic homes and provide customized solutions backed by professional testing and transparent service.

PFAS Contamination: A Growing Concern for Rose Valley Residents

Rose Valley receives its drinking water from Aqua Pennsylvania, which serves approximately 16,000 customers in Delaware County. Recent lawsuits filed by Aqua in March 2025 have brought concerning water quality issues to light. Aqua’s federal lawsuit against chemical manufacturer Arkema Inc. alleges that PFAS contamination from the company’s West Chester facility has infiltrated the Goose Creek watershed serving Rose Valley, Media, and surrounding communities.

Testing conducted by Aqua beginning in 2019 detected PFAS levels dramatically exceeding safe limits—with some samples showing concentrations above 1,700 parts per trillion, far exceeding Pennsylvania’s standards and EPA limits. These “forever chemicals” persist indefinitely in the environment and accumulate in human bodies over time. The EPA links PFAS exposure to serious health effects including certain cancers, thyroid disease, immune system suppression, and developmental issues in children. Our article on understanding PFAS and microplastics health impacts provides detailed information about these contaminants.

Hard Water and Lead: Protecting Rose Valley’s Historic Homes

Rose Valley homeowners consistently report classic hard water symptoms: white scale buildup on faucets, spotty dishes, dry skin after bathing, and reduced appliance efficiency. Delaware County’s geology naturally contributes elevated calcium and magnesium levels to local water sources. While these minerals aren’t health hazards, hard water creates expensive problems—mineral scale accumulates inside pipes, narrowing passages and accelerating corrosion in Rose Valley’s vintage fixtures. Professional water softener systems protect your plumbing investment while delivering noticeably better water quality.

Perhaps the most serious concern involves lead contamination. Rose Valley’s architectural heritage—with homes built during the Arts and Crafts movement from 1901 through the mid-20th century—means many properties contain plumbing installed before the 1986 federal lead ban. Lead doesn’t announce its presence. You cannot see, smell, or taste it in drinking water. Yet the CDC states that no amount of lead exposure is considered safe for children. Our comprehensive approach for historic homes combines testing, pH adjustment, and point-of-use reverse osmosis systems to protect families while preserving architectural character.

Community Connection: Supporting Rose Valley’s Local Character

Rose Valley’s tight-knit community thrives on local business relationships. Your neighbors support establishments like the historic Hedgerow Theatre, founded in 1923 and nationally recognized as America’s oldest continuously operating residential repertory theatre. Just down the road in Media, the Swarthmore Co-Op has served Delaware County residents since 1937 with locally-sourced foods and sustainability programming. The 320 Market Café in Swarthmore exemplifies the neighborhood’s appreciation for quality and craft, combining artisanal foods and community connection where residents know each other by name.

Dierolf has earned trust throughout Delaware County by demonstrating the same commitment to excellence, honest communication, and long-term customer relationships that characterize these beloved local businesses.