Proficiency Testing - Perchlorate Item no. ERA-1500 Unit 15 mL Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WP 375 (April 20, 2026 - June 4, 2026)WP 378 (July 20, 2026 - September 3, 2026)WP 381 (October 16, 2026 - November 30, 2026) Add to cart All product details
Proficiency Testing - Solids, Concentrate, WS, potable water Item no. ERA-5150 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Proficiency Testing - Inorganic Disinfection 2 Item no. ERA-5260 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Certified Reference Material - Inorganic Disinfection 2 Item no. ERA-5262 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Inorganic Disinfection 2 Item no. ERA-5262QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Inorganic Disinfection 1 Item no. ERA-5270 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Certified Reference Material - Inorganic Disinfection 1 QC Item no. ERA-5272 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Inorganic Disinfection 1 Item no. ERA-5272QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Inorganics PT (Extra Volume) Item no. ERA-528 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Inorganics, potable water Item no. ERA-591 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Proficiency Testing - Turbidity, potable water Item no. ERA-592 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Proficiency Testing - Residual Chlorine, potable water Item no. ERA-593 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Proficiency Testing - Nitrite, potable water Item no. ERA-594 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Proficiency Testing - Low-Level 1,2,3-TCP Item no. ERA-596 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 360 (July 13, 2026 - August 27, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 372 (July 12, 2027 - August 26, 2027) Add to cart All product details
Certified Reference Material - Hexavalent Chromium, potable water (PotableWatR TM) Item no. ERA-658 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Hexavalent Chromium, potable water (PotableWatR TM) Item no. ERA-658QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Vanadium, potable water (PotableWatR TM) Item no. ERA-660 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Vanadium, potable water (PotableWatR TM) Item no. ERA-660QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Color, Water Supply Item no. ERA-661C Unit 30 mL Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Color, Water Supply Item no. ERA-661CQR Unit 30 mL Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - UV 254 Absorbance, potable water (PotableWatR TM) Item no. ERA-662QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Dioxin, potable water (PotableWatR TM) Item no. ERA-663 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Dioxin, potable water (PotableWatR TM) Item no. ERA-663QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Mercury, potable water (PotableWatR TM) Item no. ERA-666 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - o-Phosphate Nutrients, potable water (PotableWatR TM) Item no. ERA-667 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Organic Carbon, potable water (PotableWatR TM) Item no. ERA-669 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Chloral Hydrate, potable water (PotableWatR TM) Item no. ERA-676 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Semivolatiles #2 Herbicides potable water (PotableWatR TM) Item no. ERA-691QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Hardness, potable water (PotableWatR TM) Item no. ERA-693 Unit 250 mL Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Residual Chlorine, potable water (PotableWatR TM) Item no. ERA-696 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Metals, potable water (PotableWatR TM) Item no. ERA-697 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Inorganics, potable water (PotableWatR TM) Item no. ERA-698 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Inorganics, potable water (PotableWatR TM) Item no. ERA-698QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Halomethanes (THMs), potable water (PotableWatR TM) Item no. ERA-702 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Regulated Volatiles, potable water (PotableWatR TM) Item no. ERA-703QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Chlorinated Acid Herbicides, potable water (PotableWatR TM) Item no. ERA-704 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Chlorinated Acid Herbicides, potable water (PotableWatR TM) Item no. ERA-704QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Chlordane, potable water (PotableWatR TM) Item no. ERA-705 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Chlordane, potable water (PotableWatR TM) Item no. ERA-705QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - EDB/DBCP/TCP, potable water (PotableWatR TM) Item no. ERA-706 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - EDB/DBCP/TCP, potable water (PotableWatR TM) Item no. ERA-706QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Carbamate/Carbamoxyloxime Pesticides, potable water (PotableWatR TM) Item no. ERA-707 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Carbamate/Carbamoxyloxime Pesticides, potable water (PotableWatR TM) Item no. ERA-707QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - PCBs as Decachlorobiphenyl, potable water (PotableWatR TM) Item no. ERA-708 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - PCBs as Decachlorobiphenyl, potable water (PotableWatR TM) Item no. ERA-708QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Pesticides, potable water (PotableWatR TM) Item no. ERA-709 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Halomethanes (THMs), potable water Item no. ERA-842 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 356 (March 9, 2026 - April 23, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 358 (May 11, 2026 - June 25, 2026)WS 359 (June 8, 2026 -July 23, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 361 (August 10, 2026 - September 24, 2026)WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart All product details
Proficiency Testing - Organphosphorus Pesticides (OPP) Item no. ERA-954 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Corrosivity, potable water (PotableWatR TM) Item no. ERA-980QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Cyanide, potable water (PotableWatR TM) Item no. ERA-983QR Unit each Analytes Select to compare Price on request - + Add to cart All product details