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Air Toxics at School 2022

School Info

SchoolKEYSTONE MONTESSORI SCHOOL
Street55 MIDDLESEX ST
CityNORTH CHELMSFORD
StateMA
Number of students50
Student % minority90%
Data SourcePSS (private schools)

Air Toxics Info

Number of facilities affecting school141
Number of chemicals affecting school66
Toxic percentile nationwide (1=worst)61st
Toxic rank nationwide (1=worst)78,974
Toxic percentile statewide (1=worst)81st
Toxic rank statewide (1=worst)2,013
Toxic Hazard336.10

This school's air toxic concentration is 0.07 times the national average at schools.

This school's air toxic concentration is 0.34 times the state average at schools.

Top 5 facilities

FacilityParent CompanyToxic Hazard
TECOMETCharlesbank Capital Partners71.09
GE AVIATIONGeneral Electric61.67
PROTO LABS INC.PROTO LABS INC41.84
PROTO LABS INCPROTO LABS INC41.84
UNION SPECIALTIES INCUNION SPECIALTIES INC29.76

(click here to expand list to all facilities)

Top 5 chemicals

ChemicalToxic Hazard
Chromium158.89
Cobalt86.54
Hydrazine29.65
Ethylene oxide16.20
Lead 10.44

(click here to expand list to all chemicals)

Top 5 chemicals from facilities

FacilityParent CompanyChemicalToxic Hazard
TECOMETCharlesbank Capital PartnersCobalt56.42
GE AVIATIONGeneral ElectricChromium49.74
PROTO LABS INC.PROTO LABS INCChromium41.84
PROTO LABS INCPROTO LABS INCChromium41.84
UNION SPECIALTIES INCUNION SPECIALTIES INCHydrazine29.65

(click here to expand list to all chemicals from facilities)

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Political Economy Research Institute
Gordon Hall, 418 N. Pleasant St., Suite A, Amherst, MA 01002
Tel: 413-545-6355    Fax: 413-577-0261    Contact: peri@peri.umass.edu
Toxic 100 search hosted by Grassroots Connection
Last Updated:  
2025