Corporate Headquarters
Malvern, PA
300 Lindenwood Drive
Valleybrooke Corporate Center
Malvern, PA 19355-1740 

Mailing Address:
PQ Corporation
P.O. Box 840
Valley Forge, PA  19482-0840

Tel:   (610) 651-4200
 Fax:  (610) 651-4504
 E-mail:  Customer Service
Augusta, GA
PQ Corporation
2430 Doug Barnard Parkway
Augusta, GA 30916

 Tel1:  (706) 798-4773
 Tel2:  (800) 426-5083
 Fax:  (706) 771-1523
Baltimore, MD
PQ Corporation
1301 East Fort Ave
Baltimore, MD 21230-5299

 Tel1: (410) 752-7330 
 Tel2: (800) 285-1250
 Fax: (410) 783-7387
Chester, PA
PQ Corporation
1201 West Front Street
Chester, PA 19013-3496

 Tel1:  (610) 447-3900
 Tel2:  (800) 568-1468
 Fax:  (610) 447-3930
Research & Development Center
PQ Corporation
280 Cedar Grove Road
Conshohocken, PA  19428-2240

 Tel:  (610) 651-4600
 Fax:  (610) 825-1421
Gurnee, IL
PQ Corporation
1945 Delany Road
Gurnee, IL 60031-1204

Tel1:   (847) 662-8566
Tel2:
 (888) 213-4030
Fax:
 (847) 662-9069
Jeffersonville, IN
PQ Corporation
P.O. Box 669
Jeffersonville, IN  47131-0669 

Delivery Address:
PQ Corporation
1101 Quartz Road
Clarksville, IN 47129

Tel1:   (812) 288-7186 
Tel2:   (800) 285-1445
 Fax:  (812) 288-4463
Joliet, IL
PQ Corporation
111 Ingalls Avenue
Joliet, IL 60435

 Tel1:  (815) 727-3651  
 Tel2:  (800) 727-3651  Silicates
 Tel3:  (800) 775-3651  Silicas
 Fax:  (815) 727-5312  
Kansas City, KS
PQ Corporation
1700 Kansas Avenue
Kansas City, KS 66105-1198

Tel1:   (913) 371-3020
Tel2:   (800) 736-3021
 Fax:  (913) 371-0646
Lenexa, KS
PQ Corporation
15200 Santa Fe Trail Drive
Suite 101
Lenexa, KS 66219

Tel:   (913) 744-2000
Fax:   (913) 744-2050
Parksville, BC
National Silicates
Lot A, 1140 Herring Gull
Parksville, BC  V9P 1R2
Canada

Tel:   (250) 248-8875
Fax:  (250) 248-8839
Pineville, LA
PQ Corporation
4000 Pardue Road
Pineville, LA 71360-1902

Tel1:   (318) 640-1198
Tel2:   (800) 777-4570
Fax:
 (318) 640-1199
Rahway, NJ
PQ Corporation
2 Paddock Street
Avenel, NJ 07001-1898

Tel1:   (732) 750-9040
Tel2:   (800) 346-2927
Fax:   (732) 634-1378
South Gate, CA
PQ Corporation
8401 Quartz Avenue
South Gate, CA 90280-2598

Tel1:   (323) 326-1100
Tel2:   (800) 374-1250
Fax:   (323) 562-4516
St. Louis, MO
PQ Corporation
4238 Geraldine Avenue
St. Louis, MO 63115-1291

Tel1:   (314) 383-5411
Tel2:   (800) 285-5411
Fax:   (314) 679-8521
Surrey, BC
National Silicates
8160 – 130th Street
Surrey, BC V3W 8J9
Canada

Tel:   (604) 596-0806
Fax:   (604) 596-0810
Toronto, ON
National Silicates
429 Kipling Avenue
Etobicoke, ON  M8Z 5C7 
Canada

Tel1:   (416) 255-7771
Tel2:  (866) 621-2134
Fax:   (416) 201-4343
Utica, IL

PQ Corporation
340 East Grove Street
P.O. Box 410
Utica, IL 61373-0410

Tel1:   (815) 667-4241
Tel2:   (800) 338-6109
Fax:   (815) 667-5230
Valleyfield, QC
National Silicates
132 Fabre Street
Valleyfield, QC  J6S 4K9
Canada

Tel:   (450) 373-1188
Fax:   (450) 373-3893
Whitecourt, AB
National Silicates
52d Avenue Lot 6
P.O. Box 1980
McLeod Industrial Park
Whitecourt, AB  T7S 1P6
Canada

Tel:   (780) 778-2666
Fax:   (780) 778-4885
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