Town guide · Putnam County
Mahopac's septic story is the lake's story: a century-old resort community of summer cottages that became year-round homes, many still running on systems their lots were never really sized for.
The hamlets around Lake Mahopac, Lake Casse and Kirk Lake are full of former summer cottages converted to year-round living decades ago. Conversion multiplied water use, but many lots kept their original small footprints — which means aging tanks close to the water, undersized leach fields, and tight setbacks that limit where a replacement field can go. If that describes your property, expect your replacement to need an engineered design, and treat an enhanced (nitrogen-reducing) system as a serious option: compact enhanced units are often the practical answer on small lakefront lots, and they qualify for the larger 75%/$25,000 state reimbursement where the location is eligible.
Mahopac sits in the Town of Carmel, so Putnam County's rules apply in full: county-registered contractors only, pumping every 3–5 years, and your pumper files the MS4 data sheet with the health department after each visit. Some Mahopac-area neighborhoods drain toward NYC's Croton system reservoirs, which can open eligibility for the East of Hudson reimbursement program — worth one phone call to check before paying for anything out of pocket.
Cottage conversion changed the water supply as well as the waste. Properties off the hamlet water mains run on private wells that in many cases are as old as the original system, and New York is currently paying for free testing on Putnam wells. How well testing works in Putnam County →
Services: Septic system design, installation, repair, drainage and excavation
Licensed septic installer, Putnam County DOH #1022 (valid 7/1/26–6/30/27). Family-owned since 1981; works with the Board of Health on system design and permits. Also holds Westchester County septic contractor licence #68.
Phone: (845) 736-0571 · Website
Services: Septic installation, repair, drain and leach field work, inspection; 24-hour emergency response
Licensed as East Coast Excavation Septic & Water LLC, Putnam County DOH #1325 and #1137 (valid 7/1/26–6/30/27). Also holds Westchester County septic contractor licences #43 and #44. Family-owned, operating since 2016, with 24-hour emergency service and a two-year warranty.
Phone: (914) 760-6343 · Website
Services: Septic installation, repair fields, line cleaning and high-pressure jetting; excavation and masonry
Licensed as Connolly's Landscape & Property Preservation, Inc., Putnam County DOH #1251 and #1278 (valid 7/1/26–6/30/27), and holds Westchester County septic contractor licences #560 and #687, valid to 31/12/2026 — currently licensed in both counties. Serving Westchester and Putnam for over 20 years.
Phone: (914) 879-5661 · Website
Services: Licensed septic system installation; septic pumping
Licensed septic installer, Putnam County DOH #1007 (valid 7/1/26–6/30/27), and a permitted Putnam County septic hauler. Also holds Westchester County septic contractor and collector licences. Service area not yet confirmed with the contractor.
Phone: (845) 628-0166 ·
Services: Licensed septic system installation; septic pumping
Licensed septic installer, Putnam County DOH #1054 (valid 7/1/26–6/30/27), and a permitted Putnam County septic hauler. Also holds Westchester County septic contractor licence #118 and collector licences #134 and #136. Service area not yet confirmed with the contractor.
Phone: 845-832-3163 ·
Services: Licensed septic system installation
Licensed septic installer, Putnam County DOH #1304 (valid 7/1/26–6/30/27), and holds Westchester County septic contractor licence #693, valid to 31/12/2026 — currently licensed in both counties. Service area not yet confirmed with the contractor.
Phone: (914) 417-1429 ·
Services: Licensed septic system installation
Licensed septic installer, Putnam County DOH #1305 (valid 7/1/26–6/30/27). Also holds Westchester County septic contractor licence #553. Service area and full service list not yet confirmed with the contractor.
Phone: (347) 604-3219 ·
Services: Licensed septic system installation; excavation
Licensed septic installer, Putnam County DOH #1072 and #1071 (valid 7/1/26–6/30/27). Also holds Westchester County septic contractor licences #27 and #109. Service area not yet confirmed with the contractor.
Phone: (914) 242-1999 ·
Services: Licensed septic system installation; septic pumping; tree removal
Licensed septic installer, Putnam County DOH #1257 (valid 7/1/26–6/30/27), and a permitted Putnam County septic hauler. Also holds Westchester County septic contractor licence #612. Service area not yet confirmed with the contractor.
Phone: (845) 319-6626 ·
Services: Licensed septic system installation
Licensed septic installer, Putnam County DOH #1038 (valid 7/1/26–6/30/27). Service area and full service list not yet confirmed with the contractor. Not to be confused with Better Home Sewage of Hawthorne, a separate Westchester company with a similar name.
Services: Licensed septic system installation; septic pumping
Licensed septic installer, Putnam County DOH #1030 (valid 7/1/26–6/30/27), and a permitted Putnam County septic hauler. Service area not yet confirmed with the contractor.
Phone: (845) 226-5405 ·
Services: Licensed septic system installation; water and wastewater services
Licensed septic installer, Putnam County DOH #1042 (valid 7/1/26–6/30/27), and holds Westchester County septic contractor licence #436, valid to 30/04/2027 — currently licensed in both counties. Based in Stormville, Dutchess County.
Phone: (845) 878-9711 ·
Services: Licensed septic system installation; septic inspection
Licensed septic installer, Putnam County DOH #1296 (valid 7/1/26–6/30/27), and holds Westchester County septic contractor licence #691, valid to 31/12/2026 — currently licensed in both counties. Inspection specialists.
Phone: (914) 260-1596 ·
Services: Septic pumping, maintenance, inspections (including pre-purchase), 24/7 emergency service
Permitted septic hauler, Putnam County Department of Health. Based at 15 Revere Road, Carmel. Focused on pumping, inspection and emergencies rather than new installations. Winter emergency service may be limited in freezing weather.
Phone: (845) 225-1118 · Website
Services: Septic pumping and cleaning, drain services
Permitted septic hauler, Putnam County Department of Health, and holds four Westchester County septic collector licences. Over 40 years of experience in septic cleaning and pump-outs.
Phone: (914) 739-3300 · Website
Services: Septic system design, installation, service/maintenance, inspections
Listed on Westchester County's registers as H.P. Barnes Inc. with septic contractor licences #681–#684, all valid to 31/12/2026, plus septic collector licences. Appears on the Putnam hauler dashboard; Putnam registration not yet independently confirmed. Septic experts since 1958.
Phone: (914) 666-2570 · Website
Services: Excavation, septic system installation and repair, water and sewer lines, trenchless technology
Holds Westchester County septic contractor licence #686, valid to 31/12/2026, plus collector licences #73 and #264. Appears on the Putnam hauler dashboard; Putnam registration not yet independently confirmed. Licensed and insured, WC-4149-H91/PC-192.
Phone: (914) 739-3405 · Website
Services: Septic tank pumping and cleaning, inspections (incl. real estate), repairs, line snaking, camera inspections
Holds Westchester County septic collector licence #3. Appears on the Putnam hauler dashboard; the company's own site markets Westchester, so Putnam coverage is worth confirming. Single-truck, owner-operated since 2008.
Phone: (914) 774-1952 · Website
Services: Septic tank pumping, installation, sewer systems, septic system construction, waste disposal, grease trap cleaning, cesspool pumping
Holds Westchester County septic contractor licence #87 and septic collector licence #29. Registered at 165 Todd Rd, Katonah. Appears on the Putnam hauler dashboard; Putnam coverage worth confirming. Operating since 1962.
Phone: (914) 232-3943 ·
See all Putnam County contractors →
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