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    Average homeowner rating
  • Verified reviews icon109
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Top-Rated Septic tank pros in Mashpee - Updated Nov 2026

Avatar for S.H. Dunford Construction & Excavation
S.H. Dunford Construction & Excavation
4.9(
12
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For Business

Serving Mashpee, MA and surrounding areas

Approved

In business since 2012

Free estimates

Offers commercial services

We are a locally owned cape cod business, owned and operated by native cape codder Sam Dunford. We have been in business since 2012 providing quality work at a competitive price. From septic systems and excavation, to landscape construction and hardscapes, S.H. Dunford is your one stop shop. Follow us on Facebook! Facebook.com/shdunford

Projects
Projects
Recommended by100%of homeowners
Ruberti Construction, LLC
5.0(
1
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For Business

Serving Mashpee, MA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

Ruberti Construction LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time7 hrs
Shay Environmental Services
New to Angi
Septic Tank - Clean or Pump Out

Serving Mashpee, MA and surrounding areas

Approved

In business since 2005

Free estimates

Credit card accepted

We are a locally owned and operated Septic Systems contracting company that values honesty and integrity and treats your home as if it were our own. We offer a vacant and occupied home staging services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

Avatar for A + D CONNECTIONS, LLC
A + D CONNECTIONS, LLC
New to Angi
Septic System - Install or ReplaceSeptic System - Install or Replace - For Business

Serving Mashpee, MA and surrounding areas

Approved

In business since 2025

Free estimates

Offers commercial services

**With nearly a decade of hands-on experience, A&D Connections has earned a reputation across Massachusetts for reliable, precision-driven excavation work. Proudly veteran-owned and operated, we bring discipline, integrity, and craftsmanship to every project — from septic system swaps and water main connections to full-scale excavation and site prep. Our team is dedicated to doing the job right the first time, with safety and efficiency at the core of everything we do. Whether it’s a residential or light commercial project, we deliver clean, professional results that stand the test of time. At A&D Connections, we’re not just moving earth — we’re building strong foundations for our clients and our community. Reliable. Honest. Mission-ready — that’s the A&D difference.** \n

Septic Install
Response time40 mins
Response rate100%
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Septic Tanks FAQs, answered by experts

Your garbage disposal will only affect the health of your septic tank if you’re using it too frequently, or filling it with organic waste that doesn’t fully break down. If the tank fills up with too many solids, the bacteria won’t have enough time to consume it before more is added, which can lead to an overflow in the drain field. Your tank will need to be pumped more frequently with excessive or improper garbage disposal use.

With proper maintenance, most types of septic systems—including mound, evapotranspiration, and constructed wetland systems—can last up to 40 years. To keep your system running as long as possible, follow basic septic tank upkeep guidelines, like pumping your septic tank every three to five years and only flushing human waste and toilet paper.

You can add three rotten tomatoes or 1/4 ounce of yeast to your septic tank to speed up the decomposition of sludge. You can add the tomatoes by way of your garbage disposal and the yeast by way of your toilet. You can do either of these additives once every three months as needed.

Your septic tank naturally contains the good bacteria it needs, so you typically don't have to add more as the system produces them on its own. However, if you wish to replenish the bacteria, you can use natural methods. For example, you can add three rotten tomatoes to your garbage disposal or flush 1/4 ounce of active yeast down the toilet every three months. While store-bought septic enzymes and chemicals are available, many additives are unnecessary and may even harm your system. The most effective way to maintain a healthy bacterial balance is to avoid using chemical drain cleaners, which can kill the beneficial bacteria in your tank.

Getting well water tested costs $100 to $350 if done by a pro. You can also buy DIY test kits for $20 to $100, but professional tests are more reliable. You can get a comprehensive well inspection, which includes advanced water testing, for $700 to $750, which you should do yearly anyway.

The Mashpee, MA homeowners’ guide to septic tank services

From average costs to expert advice, get all the answers you need to get your job done.