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DataCentersExposed
Mapped (unverified)

DāStor: 3400 Horizon Drive

3400 Horizon Drive · King of Prussia, Montgomery County, PA

Source: OpenStreetMap

DāStor: 3400 Horizon Drive is a mapped data center in Montgomery County, PA.

Reporting by · Updated Jun 12, 2026

Real parent
Operator
Utility
Peco Energy Co
Grid
PJM
Attribution & capacity confidence:mediumprimary source
Status · click to filter

Most sites are mapped — located but awaiting a second source. How we verify

Dot size = disclosed capacity (MW). Smallest = undisclosed, not small.

Overview

source: link

data center

Data-center discussions in Montgomery County

source: LocalView (CC0)

Local-government meetings in this county that discussed data centers, each cued to the moment. From the public LocalView corpus of government meetings on YouTube — a county-level signal, not necessarily about this specific site.

Norristown City Council
Dec 6, 2016 · 2 data-center mentions

Tax breaks & subsidies

source: Good Jobs First / GASB 77

No per-deal tax break is linked to this site yet. No state discloses the recipient of a data-center abatement at the facility level, so per-site deals are rare in the public record. If you have a development agreement or board resolution for this site, send it to us.

Water use

No public record of this facility's water use. We check state withdrawal reporting for self-supplied sites; municipally supplied sites only become visible through a public-records request to the local water utility — a per-facility request tool is coming. If you have a utility document for this site, send it to us.

EPA permits & violations

source: EPA ECHO

No reported violations as of last sync.

What this site costs the grid

source: PJM RPM auction reports
PJM RTO (rest of footprint) · 2027/28 auction
$333 /MW-day

PJM's capacity auction sets a $/MW-day price that utilities pass on to every household and business in the zone. This site sits in PJM's RTO pricing zone, where soaring data-center demand is a documented driver. See the full zone-by-zone breakdown →

Separately, a typical home in this zone pays an estimated $4 to $10/mo more on the capacity portion of its bill that PJM's market monitor attributes to data-center demand. See your address's full impact →

Air quality near this site

source: AirNow
71
PM2.5
Moderate
47
O3
Good
14
PM10
Good

Air Quality Index from the nearest AirNow reporting area (Philadelphia), as of 2026-06-10. Regional context — not this facility's own emissions.

Who lives nearby

source: Census ACS 2023
Median household income
$100.8K
People of color
20%
Below poverty
3%
Tract population
2,329

Demographics of the census tract this facility sits in (American Community Survey 5-year estimates). Environmental-justice context for who bears the local impacts.

Nearest school

source: HIFLD / NCES

The nearest public school, Gulph El Sch in King Of Prussia, is 0.9 mi from this site (450 students). 2 public schools sit within a mile of the site.

Schools are sensitive receptors for the noise, backup-generator exhaust, and traffic a large data center brings. Straight-line distance to the nearest public school (HIFLD/NCES, US public schools only).

Hearings timeline

No public-hearing records linked to this site yet. We surface planning-commission and board-of-supervisors dates when a record names a facility. If you know of a hearing on this site, tell us.