Water Heater Repair in Harwich, MA
Harwich's water comes from 14 town wells in the Monomoy Lens aquifer and is soft, and the town lists $60 per department to permit a water heater replacement. If your water heater is leaking or cold, call and get a plumber out.
What shapes water heater trouble in Harwich
Soft well water from the Monomoy Lens
The Harwich Water Department's 2025 report says the town's water comes from 14 gravel-packed wells in South, East and North Harwich, drawing on the Monomoy Lens aquifer, and serves 10,174 metered accounts. The report calls the water soft because it lacks calcium and magnesium. Potassium hydroxide is added to raise the pH and cut the water's natural corrosivity, which can otherwise leach copper and lead from plumbing, and two greensand plants remove iron and manganese.
In the latest lead sampling none of 36 homes was over the lead or copper action level, and copper at the 90th percentile was 0.038 ppm. PFAS6 was not detected.
Detached houses, mostly gas
Census estimates put the median Harwich home at 1976. About 13% were built before 1940 and about 15% since 2000. About 90% are detached houses and about 15% of households rent. Gas heats about 69% of homes, oil about 15% and electricity about 9%. The state's gas provider map lists National Grid for Harwich.
$60 permits, a seven-day transfer station
Massachusetts requires a permit for plumbing and gas work, including replacing a water heater, and the licensed plumber pulls it. Harwich's fee schedule lists $60 per department for a boiler or water heater replacement. Permits are filed online; call 508-430-7506 for help.
The Harwich Transfer Station is open seven days a week, 8 a.m. to 4 p.m., and takes large metal items for a fee.
Safe steps for Harwich homes
- Leaking? Close the cold water valve on top of the tank.
- Turn off the gas valve or the breaker for the heater.
- Gas smell? National Grid serves Harwich. Leave the house, call 911 from outside, then National Grid at 1-800-233-5325.
Repair, replacement and emergencies

Water Heater Repair
Gas, electric and tankless repairs, from pilot lights to heating elements.
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No Hot Water
Cold shower this morning? Get the cause found and fixed fast.
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Leaking Water Heater
Water around the tank or a dripping relief valve. Act before it floods.
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Emergency Water Heater Repair
Burst tank, gas smell or water everywhere. Call right away.
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Water Heater Replacement
When repair no longer makes sense, get a new tank or tankless unit.
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Tankless Water Heater Repair
Error codes, lukewarm water and scale buildup on tankless units.
Learn moreHarwich water heater questions
How much is a water heater permit in Harwich?
The town's fee schedule lists $60 per department for a boiler or water heater replacement.
Who is the gas company in Harwich, MA?
The state's gas provider map lists National Grid for Harwich. If you smell gas, leave first, then call 911 or National Grid at 1-800-233-5325 from outside.
Is Harwich water hard or soft?
Soft. The water department says it lacks calcium and magnesium, and it adds potassium hydroxide to reduce corrosivity.
Where can I take an old water heater in Harwich?
The Harwich Transfer Station takes large metal items for a fee. It is open seven days a week, 8 a.m. to 4 p.m.
Where these local facts come from
- US Census Bureau, American Community Survey 2020-2024 (via Census Reporter)
- Harwich Water Department, 2025 Consumer Confidence Report
- MassGIS / Mass. DPU, natural gas providers by town (Oct 2025)
- 248 CMR 3.05, permits and inspections
- Town of Harwich Building Department, permit fee schedule
- Town of Harwich, MA, Building
- Town of Harwich, MA, Transfer Station
- National Grid, report a gas emergency (MA)
Figures are the latest published by each source. Pricing and availability are set by the plumber.
No hot water in Harwich?
Call now for water heater repair or replacement.