Newtown Square is a community where historic charm meets modern living—home to landmarks like the Square Tavern, Bartram’s Covered Bridge, and the Paper Mill House Museum. With a population of approximately 13,000 residents, and a ZIP code of 19073, this community values reliability, comfort, and safety. For over 25 years, Dierolf Plumbing & Water Treatment has been the trusted local partner—backed by Licensed Master Plumbers, Licensed Well Inspectors, and 1,000+ five-star reviews. Whether you’re stepping out from the Newtown Theatre after a performance or meeting friends at a café, knowing your water is clean and dependable makes all the difference.
Local water is provided by Newtown Artesian Water Company, which operates under Pennsylvania DEP and EPA regulations, and consistently delivers compliant drinking water as detailed in its annual Consumer Confidence Reports (2024 CCR, external). Still, many homeowners seek better taste, mineral balance, and added protection from trace contaminants. That’s where our services come in—from water testing & analysis and reverse osmosis to water softeners and UV disinfection—we help ensure water that’s not just compliant, but confidently clean.
Water Quality & Plumbing Services for Newtown Square Homes
Arsenic, disinfection byproducts, and emerging contaminants: Though Newtown Artesian Water Company meets current federal standards and has no violations reported in its 2024 CCR (2024 CCR, external), independent assessments like EWG highlight arsenic and byproducts that remain above health-based guidelines (~250× for arsenic) (EWG data, external). Our point-of-use carbon and RO systems provide an effective safeguard. Learn more in Understanding the Impact of PFAS and Microplastics on Human Health.
Hardness & scale: Local well and municipal sources may contribute to mineral hardness. Our water softeners help prevent buildup on fixtures and extend appliance life; see tips in Is Your Water Softener Actually Working?.
pH, corrosion & staining: Slightly acidic water can degrade plumbing and leave discoloration. Our neutralizers balance your water and protect fixtures—see installation best practices in Why Air Gaps Matter.
Community connections
We’re proud to serve this historic yet forward-looking area. Maybe you just visited the Paper Mill House Museum (Paper Mill House Museum, external), caught a show at the Newtown Theatre (Newtown Theatre, external), or relaxed at the Hood Octagonal School site (Hood Octagonal School, external)—while we ensure the water in your home remains pure and worry-free.
Homeowner FAQs
If my tap meets the CCR standards, do I need additional filtration? Compliance means regulatory limits are met, but that doesn’t necessarily align with evolving health guidelines. For example, EWG data shows arsenic levels far above health advisories (~1 ppb vs 0.004 ppb guideline). To ensure safety and taste, we recommend water testing & analysis followed by customized treatment like RO or carbon filtration.
How can I know if my water is hard enough to require a softener? Watch for dish spots, scale buildup, or reduced lather with soaps. We measure hardness on-site and tailor a water softener that protects your plumbing and appliances—both in functionality and longevity.
Do you serve homes with private wells as well? Absolutely. While Newtown Square primarily uses municipal water, we also serve well-dependent homes—offering well inspections, well systems, testing & analysis, and full-service residential plumbing.
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Bryan was very professional, courteous, and efficient. Great service, thank you!
Great job installing our new water filtration system! Installers were very communicative and efficient. Well done.
Very very helpful and nice people! Wow i thought companies that care were gone not so!!! Dierolf’s people care and i think it’s a real reflection of the owner and how he runs his company and actually cares!! Thank you for a super great job and for caring!!
Service was great and very efficient. The guys were very friendly and quickly replaced the pump without any issues. Thank you.
They did a great job installing a new toilet in my bathroom. They were neat, clean, and paid attention to detail. Chris answered all of my plumbing questions without hesitation. Very satisfied... Highly recommend
