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Townes Septic Service
Concord, NH
Townes Septic Service provides professional septic services in Concord, NH and surrounding areas.
Septic PumpingSeptic RepairSeptic Inspection
Septic Services in Concord, NH
Merrimack County · Pop. 43,976
Concord is New Hampshire's state capital and the seat of Merrimack County, situated at the geographic center of the state along the Merrimack River. As the state capital and a regional service hub, Concord's inner city neighborhoods are served by municipal sewer, but the surrounding towns of Merrimack County — Bow, Dunbarton, Hopkinton, Warner, Sutton, Bradford, Henniker, and Hillsborough — rely overwhelmingly on private septic systems. Merrimack County has an estimated 30,000 to 35,000 on-site wastewater systems spread across its towns, with a significant proportion being aging systems installed before New Hampshire adopted its current Env-Wq 1000 rules. The county's proximity to the Lakes Region to the north means many properties fall under the NH Shoreland Water Quality Protection Act, which adds significant siting restrictions for lakefront and streamside lots. NH DES is headquartered in Concord, making Merrimack County the epicenter of NH septic regulatory activity — inspectors and LSEs are often most familiar with the local geology and enforcement standards. The capital city's development pressure has pushed residential growth into hillside and valley lot configurations that frequently challenge conventional septic design.
Septic Providers in Concord (6)
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Felix, A Wind River Company
Manchester, NH
Felix, A Wind River Company provides professional septic services in Manchester, NH and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Septic PumpingSeptic RepairSeptic Inspection
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Garside Sewer & Septic Service
Manchester, NH
Garside Sewer & Septic Service provides professional septic services in Manchester, NH and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Septic PumpingSeptic RepairSeptic Inspection
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Manchester Plumbers, Drain & Septic Cleaning - Rowell's Services provides professional septic services in Manchester, NH and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Septic PumpingSeptic RepairSeptic Inspection
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St. Onge Septic Tank Pumping
Manchester, NH
St. Onge Septic Tank Pumping provides professional septic services in Manchester, NH and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Septic PumpingSeptic RepairSeptic Inspection
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WASTE WARRIORS SEPTIC
Manchester, NH
WASTE WARRIORS SEPTIC provides professional septic services in Manchester, NH and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Septic PumpingSeptic RepairSeptic Inspection
Services in Concord
Drain Field Repair
$2,000 – $15,000
Grease Trap Pumping
$200 – $800
Septic Inspection
$300 – $600
Septic System Installation
$3,500 – $20,000
Septic Tank Pumping
$275 – $600
Septic Repair
$500 – $5,000
Well Drilling
$6,000 – $25,000
Well Pump Repair
$300 – $3,000
Well Water Testing
$50 – $500
Well Water Treatment
$500 – $8,000
Septic Service Costs in Concord
| Service | Average Cost |
|---|---|
| Septic Tank Pumping | $325 - $500 |
| Septic System Installation | $7,000 - $20,000 |
Soil Conditions
Merrimack County soils reflect a complex glacial legacy of till uplands, stratified outwash terraces, and glaciolacustrine deposits along the Merrimack River valley. Dominant upland series include Marlow-Berkshire-Peru associations — coarse-loamy Haplorthods and Fragiorthods formed in glacial till with stony, moderately well-drained profiles. The Merrimack River terrace soils include Merrimack sandy loam and Windsor loamy sand — excessively drained, rapid-percolation Entisols with minimal treatment capacity. Glaciolacustrine silt loam soils (Raynham, Walpole series) occupy former lake bottom positions in the Penacook lowlands with very slow percolation and seasonal saturation.
The Marlow series (coarse-loamy, mixed, active, frigid Oxyaquic Fragiorthods), dominant on till uplands throughout Merrimack County, contains a fragipan at 24–40 inches that significantly restricts percolation. Like the related Skerry series in Maine, the Marlow fragipan is a dense, brittle horizon formed by glacial till cementation that creates a near-impermeable barrier to vertical water movement. NH DES Env-Wq 1004.06 requires a minimum of 24 inches of naturally occurring soil below the bottom of the distribution area to the seasonal high water table or any restrictive layer. Where Marlow soils have fragipan at 24 inches, mound systems on imported fill are required. The Berkshire series (coarse-loamy, mixed, active, frigid Typic Haplorthods) is better drained and more suitable for conventional systems. Stratified drift soils along the Merrimack River valley — Windsor loamy sand and Merrimack sandy loam — percolate rapidly (more than 6 inches per hour) but provide minimal biological treatment of pathogens before reaching the alluvial aquifer, which is a source of drinking water for communities downstream in the Merrimack watershed.
Water Table: Upland till positions in Merrimack County have seasonal perched water tables at 18–36 inches in spring (March–May). The Merrimack River flood terrace has a shallow year-round water table at 2–4 feet. Glaciolacustrine positions near the Penacook lowland can have water tables within 12 inches of the surface during spring high water. The Lakes Region to the north (Lake Winnisquam, Northwood Lake drainage) has shallow water tables in low-lying areas adjacent to water bodies under NH Shoreland Water Quality Protection Act jurisdiction.
Local Regulations
New Hampshire's Env-Wq 1000 Rules for the Design, Installation, and Maintenance of Disposal Systems govern all on-site septic work in Merrimack County. NH DES Subsurface Systems Bureau, headquartered in Concord at 29 Hazen Drive, is the sole permitting authority — unlike Maine's dual state/local system, NH does not delegate septic permits to municipalities. Licensed Site Evaluators must prepare and stamp all system designs for new installations and major repairs. Concord and adjacent towns along the Merrimack River fall under NH Shoreland Water Quality Protection Act (RSA 483-B), requiring 75-foot undisturbed buffer zones and 125-foot setbacks for new septic systems from the river and its mapped tributaries. The NH DES Wetlands Bureau may require additional coordination for system siting within 100 feet of mapped wetlands. Shared systems serving two or more dwellings — common in Concord's hillside neighborhoods — require a Board-approved Operation and Maintenance plan filed with NH DES.
All septic permits in Merrimack County are issued by the New Hampshire Department of Environmental Services (NH DES), Subsurface Systems Bureau under Env-Wq 1000 rules. A Licensed Site Evaluator (LSE) or Professional Engineer must design the system and submit a complete application to NH DES before a permit is issued. After completion, an as-built plan must be filed with both NH DES and the Concord city clerk within 30 days. NH DES permit fees range $75–$300 depending on system type and complexity. Concord's portions within the Merrimack River corridor fall under NH Shoreland Water Quality Protection Act jurisdiction, requiring 75-foot undisturbed buffer zones from the river. The NH DES Well and Wastewater Section coordinates permit reviews for properties with both private wells and septic systems to verify the mandatory 75-foot separation distance.
Frequently Asked Questions — Concord
Does Concord use municipal sewer or do most properties have septic?
The City of Concord itself is served by municipal sewer. However, the surrounding Merrimack County towns — including Bow, Dunbarton, Hopkinton, Warner, Sutton, Bradford, and Henniker — rely entirely on private septic systems. Even within Concord, older hilltop neighborhoods and properties annexed from surrounding towns may be on septic. Contact the Concord Department of Public Works or NH DES to verify sewer availability at a specific address before assuming service.
How does the NH Shoreland Water Quality Protection Act affect septic systems near Concord?
RSA 483-B applies to all properties within 250 feet of public waters — including the Merrimack River, Contoocook River, and all mapped lakes and ponds in Merrimack County. Within the protected shoreland, new septic systems must maintain a 125-foot setback from the water body, a 75-foot undisturbed natural buffer zone must be maintained, and NH DES review is required. Many lakefront properties in the Northwood Lake, Lake Winnisquam, and Lake Sunapee vicinities accessible from Concord cannot accommodate a compliant septic system on standard residential lot sizes.
Who issues septic permits in the Concord area?
All septic permits in New Hampshire, including Merrimack County, are issued exclusively by NH DES Subsurface Systems Bureau at 29 Hazen Drive in Concord. Unlike some states that delegate permitting to counties or municipalities, NH maintains centralized state-level permitting for all on-site systems. A Licensed Site Evaluator (LSE) must prepare and certify your system design before NH DES will issue a permit. Allow 4–8 weeks for permit review for standard systems; complex or shoreland-zone sites may take longer.
What is the typical septic installation cost in Merrimack County?
Standard gravity systems in suitable soils run $7,000–$12,000 in Merrimack County. Mound systems, commonly required on till soils with fragipan or shallow bedrock, typically cost $13,000–$20,000 including fill delivery, pressure distribution network, and pump chamber. Engineered drip irrigation systems for smaller lots range $18,000–$28,000. Professional fees — LSE evaluation ($500–$1,000) plus engineered design ($800–$1,800) — are additional.
How often should septic tanks be pumped in the Concord, NH area?
NH DES recommends pumping every 3 to 5 years for typical households in New Hampshire. Concord's climate — with its 44–48 inch frost depth and rapid spring snowmelt — means drain fields face significant seasonal stress that can accelerate system wear. Households with 4 or more residents, garbage disposals, or high water use should pump every 2–3 years. NH law requires an as-built plan to be on file — if you cannot locate your system's as-built, the Concord city clerk or NH DES may have records filed at time of installation.
Nearby Cities
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