Massachusetts Water Bans, Wetlands Buffer Zones, and Lawn Laws by Town

Statewide rules

The wetlands buffer zone and the riverfront area

Wetlands Protection Act, MGL c. 131, s. 40; 310 CMR 10.00

No one may remove, fill, dredge, or alter any wetland, floodplain, bank, land under a water body, land within 100 feet of a wetland, or land within 200 feet of a perennial stream or river without a permit from the local Conservation Commission. The 100 feet is the buffer zone; the 200 feet is the riverfront area created by the Rivers Protection Act of 1996.

The riverfront area is 25 feet, not 200, in fourteen named municipalities — Boston, Brockton, Cambridge, Chelsea, Everett, Fall River, Lawrence, Lowell, Malden, New Bedford, Somerville, Springfield, Winthrop, and Worcester — and in densely developed areas designated by the Secretary of Energy and Environmental Affairs under 301 CMR 10.00 (source: 310 CMR 10.58(2)(a)3; Mass.gov, Rivers Protection Act Questions and Answers). Section 18 of the Rivers Protection Act also names certain identified land in Waltham and Milton for the 25-foot riverfront. The riverfront area is 100 feet for new agricultural and aquacultural activities. It has no buffer zone of its own; it is measured horizontally from the mean annual high-water line, and it stops at the upstream end of any culvert longer than 200 feet and resumes at the downstream end.

Buffer zones are measured horizontally from the top of the bank or the wetland edge. Whether a stream is perennial or intermittent decides whether the 200-foot riverfront area applies; the test is in the Appendix to 310 CMR 10, and a wetlands scientist makes the call.

Towns state it plainly in their own FAQs: most activities, including construction, landscaping, and grading, require a permit, while normal maintenance such as mowing, certain fences, and planting native plants does not (source: Holliston, Dracut, and Palmer Conservation FAQs). Stripping an old lawn, importing topsoil, regrading, and sodding inside the buffer is a permit activity; mowing the lawn that is already there is not.

Two filings exist. A Request for Determination of Applicability (RDA) covers small projects entirely within the 100-foot buffer zone and not within the riverfront area; a Notice of Intent (NOI) leading to an Order of Conditions covers everything else. RDAs require a public hearing advertised at the applicant's expense; abutters need not be notified for an RDA.

Local wetlands bylaws stack on top of the state act, and more than 100 Massachusetts towns have adopted one (source: mass.gov real estate continuing education module RE23RC12). Many divide the buffer into an inner no-disturb zone and an outer zone: Cohasset treats the first 50 feet as a no-touch zone, Maynard requires a 50-foot no-disturb zone, and Chatham's Chapter 272 sets 50 feet. A Massachusetts Appeals Court decision involving Andover struck down a 25-foot no-build policy that was not written into the town's bylaw or regulations and not supported by evidence, which is why the towns listed on this page publish their no-disturb distances in the bylaw itself. The town row shows the local bylaw where verified.

Under the Inland and Coastal Wetlands Restriction Acts, permanent restriction orders recorded at the Registry of Deeds cover selected wetlands in more than 50 communities; any Notice of Intent on a restricted wetland must say so (source: mass.gov, Protecting Wetlands in Massachusetts). Agricultural land in normal use is exempt from the Wetlands Protection Act; preparing new land for agriculture is not.

For a worked example of a lawn inside the 100-foot buffer, see the Chatham sod installation inside the wetlands buffer and the wetlands section of the Cape Cod fertilizer regulations town by town.

The local no-disturb distance that applies to you is in your town's row below.

The fertilizer law (every town)

330 CMR 31.00, the Plant Nutrient Application Requirements, statewide

On Cape Cod, Nantucket, and Martha's Vineyard, town bylaws adopted under Chapter 262 of the Acts of 2012 add nitrogen caps (1.0 pound per 1,000 square feet per application, 3.2 pounds per year), a November 12 to April 14 blackout, and a 100-foot no-fertilizer buffer along water — see the Cape Cod fertilizer regulations town by town. That 2012 act authorized three bodies to go beyond the state rule: the Cape Cod Commission, the Martha's Vineyard Commission, and the Nantucket Commission. Cape towns adopted the county model in 2014; Nantucket's Board of Health acted first, on January 1, 2013, with a tighter cap (0.5 pounds of nitrogen per application versus the Cape's 1.0) and a professional licensing requirement the Cape does not have. Cape and Island lawns are also chosen differently in the first place — see the best sod options for Cape Cod and the Islands.

What Massachusetts does not regulate

Off the Cape and Islands there is no calendar blackout by date, no nitrogen cap, and no slow-release requirement. The statewide rule reaches those only through its ban on applying to frozen, saturated, or dormant turf.

Drought levels and what they mean for your sprinklers

Massachusetts Drought Management Plan; Water Management Act, 310 CMR 36.00

Watering restrictions in Massachusetts reach you through your public water supplier's state permit, keyed to a drought level the state declares by region. The same street can hold a restricted town-water lawn and an unrestricted private well. That matters for anyone planning sod delivery in Massachusetts — the level below decides how a new lawn gets watered.

• MassDEP maintains a searchable Current City and Town Water Restrictions list, updated through the season, showing every public water supplier's restriction level and the days of watering allowed: check today's restriction for your town on the MassDEP list. Towns with more than one supplier are starred because each supplier's rule can differ.
• Levels are declared by region by the Executive Office of Energy and Environmental Affairs on the Drought Management Task Force's recommendation, using precipitation, streamflow, lake, and groundwater percentiles. The regions: Western, Central, Northeast, Southeast, Cape Cod, Islands, and Connecticut River Valley.
• The restrictions reach you through your public water supplier's Water Management Act permit or registration (310 CMR 36.00). Suppliers must impose the plan's restrictions when a drought is declared, must notify MassDEP when they do, and may go stricter. A town without a Water Management Act permit is capped at two days per week during a State of Water Supply Conservation.
• The Water Management Act of the 1980s let suppliers register the water they were already using; registered volumes were grandfathered, and for decades registered-only suppliers did not have to impose drought restrictions at all while permitted suppliers did. That is why Ipswich residents lived under strict lawn-watering rules while Peabody, Lynn, and Salem, drawing from the same Ipswich River, did not (CBS Boston). MassDEP's 2023 revisions to 310 CMR 36.00 changed the registration conditions so that registered suppliers must also implement the Drought Management Plan's nonessential outdoor use restrictions when a drought is declared, and where a supplier holds both a registration and a permit, the permit's restrictions control. If your town's rules seem looser than the next town's, this is usually why, and the gap is closing.
• Cape Cod and the Islands are different: restrictions there are triggered by USGS groundwater observation wells falling to or below the 25th percentile for the month, March through September, not by reservoir levels, because the Cape has no reservoirs. The install side of that story is on the Cape Cod sod installation page.
• MWRA communities — the 31 fully supplied and 13 partially supplied communities listed in the town rows, on the Quabbin and Wachusett system — were not in drought as of June 2026 while the rest of the state was, and typically face no mandatory restrictions when their own supply is healthy; MWRA asks for voluntary conservation instead.
• Nonessential is defined by the plan as use not required for health or safety, by regulation, for food production, for livestock, or for a business's core function. Lawn irrigation is the first item on every town's nonessential list. Whether a new lawn being established counts as essential is not answered by the state plan — check your town's row and call the water department before the sod is ordered.
• Status as of the verified date: Level 2 Significant Drought declared for the Northeast region August 7, 2026 (Natick notice) and for the Cape Cod region in June 2026 (Barnstable notice); Southeast and Cape conditions were reported worsening June 9, 2026 (mass.gov). Current status changes monthly; check the state's drought status page before scheduling.

Notice the shape of the exceptions. The towns that grant them shut the door in June, July, and August, exactly as Aquarion does in Connecticut; the two windows that survive a Massachusetts drought are May and September. West Newbury's own water department says it plainly: install in mid-spring or early fall, spend the extra on loam so the lawn holds water, and do not wait until summer. Duxbury's exception is narrower still, tied to construction and septic work, and Duxbury bans hand-watering of lawns outright at Level 2. Call the water department before the sod is ordered.

The May-and-September wording that Sudbury, West Newbury, and Aquarion's Massachusetts systems all use comes from MassDEP's Model Water Use Restriction Bylaw, which lists irrigation to establish a new lawn and new plantings during the months of May and September as a use that may be allowed under mandatory restrictions. Towns that adopted the model language have the exception; towns that wrote their own often do not (source: MassDEP Model Water Use Restriction Bylaw, linked from the restrictions page; Aquarion Massachusetts Irrigation FAQ).

Aquarion's Massachusetts systems (the Hingham, Hull, and North Cohasset system, plus Millbury, Dover, and the Ponds of Plymouth and Pinehills systems in Plymouth) published a dated 2026 sequence: May 11, Level 2, drip and hand-held watering for ornamentals permitted; June 15, one system moved to one day per week and another to two days per week under Level 2, depending on whether the permit's residential-use trigger (65 gallons per person per day the prior year) applied; July 1, Dover limited to hand-held watering before 9 a.m. or after 5 p.m. to match the town; July 15, nonessential outdoor use banned except drip and hand-held for ornamentals. In Millbury, Dover, Ponds of Plymouth, and Pinehills, irrigation to establish a new lawn and new plantings in May and September is exempt from mandatory restrictions, along with public parks and fields outside 9 to 5 and hand-held and drip watering for gardens. Current levels change; check Aquarion's Massachusetts irrigation FAQs for today's notice.

New sod needs water every day for roughly two weeks — here is what the first 14 days actually take. In a Level 1 town that means one sprinkler day plus hand watering the rest; in a Level 2 town it means hand watering or drip only; in Level 3 it means no install on town water until the level drops. The practical windows for Massachusetts installs on public water in a drought year are late April to early June and mid-September to late October, when evapotranspiration is lowest and towns are most likely to be at Level 0 or 1.

Leaf blowers

Massachusetts has no statewide ban; a bill to restrict gas leaf blowers has not passed. Towns act on their own, and the Boston suburbs have moved fastest. As of March 2026: Cambridge banned gas-powered leaf blowers in 2025; Lexington and Arlington banned them year-round effective March 15, 2026, with narrow exceptions for wheeled four-stroke blowers on properties over one acre and for emergencies; Belmont and Concord bans took effect in 2026; Newton bans gas blowers from Memorial Day through Labor Day and prohibits any blower louder than 65 decibels year-round; Brookline, Marblehead, and Swampscott run seasonal bans; Lincoln and Winchester restrict use. In Lexington and Arlington the resident and the landscaper can both be fined for the same violation (sources: CBS Boston, March 23, 2026; Boston.com, March 25, 2026). Every town not named here reads "No town ordinance located as of the verified date" in its row below.

Fill, grading, and erosion control

Massachusetts has no statewide half-acre erosion and sediment control statute like Connecticut's. Three things apply instead: inside wetlands jurisdiction, the Order of Conditions carries erosion controls and the MassDEP Stormwater Management Standards; outside it, many towns have earth removal, fill, or land disturbance bylaws with their own thresholds; and any project disturbing one acre or more falls under the federal Construction General Permit, which EPA administers directly in Massachusetts.

Some towns regulate the dirt itself. Lexington's Earth Fill and Removal bylaw requires a Board of Appeals permit to bring more than 25 cubic yards of topsoil, loam, or sod onto a lot in any three years unless it is tied to a building permit. A 6,000 square foot lawn prepped with four inches of topsoil is roughly 75 cubic yards, so on a Lexington lot with no building permit open, the topsoil delivery needs a permit before the sod does. The Chatham job moved about 80 yards of material for the same reason. Every town's fill row below reads "verify with Planning or Conservation" unless a verified threshold has been supplied.

Dig Safe: Massachusetts law requires at least 72 hours' notice (excluding weekends and holidays) to Dig Safe, 1-888-DIG-SAFE, before any excavation, and the caller receives a permit number as confirmation. A sod crew running a sod cutter, a tiller, or a skid steer is excavating (source: Massachusetts State Building Code, Appendix 120.J, Note 1).

The building code's grading appendix (780 CMR Appendix 120.J) governs excavation and fill within flood hazard areas and notes that grading in or near wetlands must also meet the Wetlands Protection Act. It does not set a residential topsoil threshold; that is why the town bylaw, where one exists, is the number that matters. There is no MassDEP permit for bringing clean topsoil onto a residential lot; the state's soil policies apply to reclamation projects of 100,000 cubic yards or more (source: mass.gov Appendix 120.J; MassDEP Policy COMM-15-01).

Massachusetts towns A to Z

114 cities and towns verified so far, newest batch September 3, 2026. Every other Massachusetts municipality follows the statewide rules and its water supplier's rules above — use the finder to ask us to add yours.

Sources

• Massachusetts Wetlands Protection Act, MGL c. 131, s. 40, and 310 CMR 10.00
• Wetlands Protection Act regulations preface on the Rivers Protection Act (Lexington-hosted copy)
• Town of Dracut, Wetlands FAQ
• Town of Holliston, Conservation FAQ
• Town of Cohasset, What is the Wetlands Protection Act
• Town of Maynard, Obtaining a Wetlands Permit
• Town of Maynard, Water Restrictions
• Town of Natick, Water Use Restrictions
• MassDEP, Water Management Act regulations 310 CMR 36.00 revisions (drought restriction table)
• MassDEP, Outdoor Water Use Restrictions on Cape Cod, the Islands and the Plymouth-Carver Aquifer (May 21, 2025)
• Mass.gov, Drought Conditions Worsen in the Southeast, Cape Cod and Islands Regions (June 9, 2026)
• Mass.gov, Drought Status
• MassDEP, Current City and Town Water Restrictions
• Barnstable Water Resources, Level 2 declaration (June 18, 2026)
• Barnstable Water Resources, restrictions eased (May 27, 2026)
• Cape Cod Chronicle, Residents Push For Laxer Watering Regs (2026)
• Cape Cod Chronicle, Chatham Imposes Mandatory Outdoor Watering Restrictions (May 1, 2025)
• 330 CMR 31.05
• Cape Cod Cooperative Extension, Plant Nutrient Management
• CBS Boston, Gas-powered leaf blower bans take effect in Arlington and Lexington (March 23, 2026)
• Boston.com, New laws ban gas-powered leaf blowers in 2 Mass. towns (March 25, 2026)

The rules above describe a job done in the right order: the wetlands check before the design, the water department call before the sod order, fertilizer at installation and then by soil test, and a crew that knows which towns let a blower run at all.

CT Sod handles sod installation across Massachusetts and Cape Cod and will walk through the wetlands, watering, and town questions for a specific address before a quote.