Septic Pumping, Inspections and Repair in Chelmsford, MA

Permits

Septic permits and rules in Chelmsford

The Board of Health runs it. Septic permits are filed through PermitEyes in three steps. First comes a soil test (perc test) application, after which the town's consultant schedules and observes the testing. Second is plan review for the Disposal System Construction Permit. Third, a licensed installer applies for the construction permit, and the town inspects the bed bottom, tank bottom, final components and final grade and samples the sand fill; the Board's fee schedule lists inspection fees separately. The installer and designer certify the work on Form 3 within 30 days; no sewage may enter the system until the Certificate of Compliance is issued, and no occupancy permit issues without it. In a Groundwater Protection Zone, other boards must sign off before the soil test step (Septic Process, updated April 2024).

A winter construction ban. The same document says soil absorption system excavation and related construction is not allowed from November 30 to April 1. It's a standing seasonal rule, so leach field excavation can't start in those months, and Article XIX requires a system with a backup or surfacing sewage to be pumped right away and then every two weeks until it is repaired.

Soil testing

$800 new construction; $615 upgrade or repair

Plan review

$380 initial; $240 revised submission

Inspections

$450 each for tank bottom, bed bottom and final grade; $685 system final

Installer and pumping permits

$125 and $150 a year, renewing December 31

Late filing

Permit fee doubled

Schedule

Implemented 11/21/2018, last revised 10/7/2024

Fees. The Board's fee schedule, implemented November 21, 2018 and last revised October 7, 2024, lists $800 for new-construction soil testing, $615 for upgrade or repair soil testing and $380 for initial plan review, with higher tiers for larger flows (Permit Fees, revised 10/7/24).

Article XIX. The On-Site Wastewater System Maintenance and Inspection regulation, Chapter 201 §§ 201-150 to 201-158, has been in force since February 3, 2026 (Article XIX). It goes well past Title 5:

• Pumping by system age: outside high aquifer areas, at least every four years up to 16 years old, every two years from 17 to 30, and every year after that; in high aquifer areas, every two years up to 16, then every year. Homes with a garbage disposal pump every year.
• Inspections every four years, or every three for high aquifer systems over 30 years old, done by a Massachusetts Class 2 wastewater operator or a Chelmsford-licensed installer.
• Pumping and inspection reports filed with the Board of Health by August 1 of the year they are due.
• A system is presumed as old as the house unless the owner shows credible evidence otherwise.
• On a failure, the inspector notifies the Board and the owner within 24 hours; a high aquifer failure needs a Board hearing before repair or replacement.

Treatment units and groundwater. Under Article VI, amended July 12, 2021, a secondary treatment unit is examined twice a year, within 14 days of March 15 and September 15, and needs an annual Permit to Operate renewed each January 1 (Article VI).

State rules. A sale needs a Title 5 inspection within two years before closing, or three years with annual pumping records, by a MassDEP-approved System Inspector; NEIWPCC keeps the list (MassDEP buying or selling guide). Designs come from a Registered Sanitarian or a Massachusetts-registered professional engineer, and perc tests happen in the presence of the approving authority (310 CMR 15.000).

Last verified November 2026. Fees, restrictions and deadlines on this page are due for re-checking by May 2027. New England Septic Pros is a referral service. We don't pump, inspect or build systems; the contractor files the permits and reports.

Water

Water Chelmsford protects

Wellhead protection. The Aquifer Protection Overlay District, adopted in 1988, covers three separate wellhead protection areas; Zone I is a 400-foot radius around each wellhead and Zone II is the recharge area under stressed pumping (Master Plan, October 2021). Drinking water comes from three independent districts: Chelmsford, North Chelmsford and East Chelmsford (Water Districts), and the Zone II areas of two Chelmsford wells reach into Lowell.

Groundwater Protection Zone. Article VII, amended August 2, 2021, covers land where groundwater flows toward a well over stratified sand and gravel, plus land within 150 feet of the center line of certain streams. A site in the zone needs an Environmental Impact Report with a geohydrology report (Article VII).

Sand that drains fast. The 2010 open space plan says excessively drained sandy soils made private septic systems standard for single-family homes, and that sewer made lots with high groundwater buildable (2010 Open Space and Recreation Plan).

Wetlands. The Wetlands Bylaw Regulations, effective September 15, 2015, require plans to show existing septic systems and allow no disturbance, including excavation, within 25 feet of a resource area and no impervious surface within 30 feet (Wetlands Bylaw Regulations).