Lowell, MA
Markley Group – Lowell
Markley Group · Operating · 1 Markley Way
Massachusetts' largest data center (352,000 sq ft), operating in Lowell's Sacred Heart neighborhood since 2015. A 2025 MassDEP air-quality permit for 27 backup diesel generators and 16 cooling towers to support an AI-driven expansion drew a legal appeal and prompted the city's first data-center construction moratorium in March 2026. Water bills obtained by WBZ-TV in June 2026 show Markley reporting 60,000–120,000 gallons of water use per day over the prior year.
Estimated water use
EstimateNo published facility capacity (MW) is available yet. No estimate is shown without a published figure.
Lifecycle timeline
ObservedConfirmed events only, each with its source.
~January 2015
Became operational
Construction of the Lowell facility, now Massachusetts' largest data center, is completed and it begins operating.
SourceJuly 3, 2025
Permit issued
Massachusetts DEP approved Markley's air-quality plan to operate 27 diesel backup generators and 16 cooling towers to support an AI-driven expansion, without cumulative-impacts analysis or MEPA review.
SourceMarch 10, 2026
Local opposition activity
Lowell City Council adopted a temporary one-year moratorium on new data center construction and development by a 10-0 vote, the first such moratorium in Massachusetts, in response to community opposition to the Markley expansion.
SourceJune 22, 2026
Operator discloses actual water use via water bills
Water bills obtained by WBZ-TV show Markley reporting 60,000-120,000 gallons of water use per day over the prior year -- a rare directly-disclosed usage figure rather than a modeled estimate. No facility-specific water source was stated in the report.
Source
Observed hydrologic data
ObservedFrom nearby USGS and NOAA monitoring stations, refreshed monthly. Dashed lines mark lifecycle milestones.
Groundwater level (ft below surface)
2 stations, overlaid
Regulatory records
ObservedWater permits and environmental compliance records from MassDEP WMA permits and decisions and EPA ECHO.
No permit or compliance record from these sources currently matches this facility.
Drawdown story
AssessmentIs the water table's behavior near this facility consistent with its estimated draw — and how strong is the evidence? A fixed rubric, recomputed monthly; every number below is stored with the inputs that produced it. Method: attribution-v1.
1 · Pathway
This facility is supplied by a public water system — its estimated draw lands on that system's sources, not this local water table.
2 · Detectability
Expected drawdown at the nearest monitored well could not be computed (no water-use estimate is available).
3 · Signal
No monitored well within 2 miles of this facility — there is no near-field record to compare against controls.
No local withdrawal pathway — estimated draw does not reach this water table directly.
Attribution evidence score: withheld · as of 2026-07-22 · attribution-v1