Proficiency Testing - Perchlorate Item no. ERA-1500 Unit 15 mL Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WP 372 (January 20, 2026 - March 6, 2026)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
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
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
QuiKResponse - Mercury, potable water (PotableWatR TM) Item no. ERA-666QR 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
QuiKResponse - o-Phosphate Nutrients, potable water (PotableWatR TM) Item no. ERA-667QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Organic Carbon, potable water (PotableWatR TM) Item no. ERA-669QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Chloral Hydrate, potable water (PotableWatR TM) Item no. ERA-676QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Quality Control Product -Low-Level 1,2,3-TCP Item no. ERA-682 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Low-Level 1,2,3-TCP Item no. ERA-682QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Unregulated Volatiles, potable water (PotableWatR TM) Item no. ERA-683QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Haloacetic Acids (HAA), potable water (PotableWatR TM) Item no. ERA-684QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Semivolatiles #1, potable water (PotableWatR TM) Item no. ERA-690QR 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
QuiKResponse - Hardness, potable water (PotableWatR TM) Item no. ERA-693QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Nitrite, potable water (PotableWatR TM) Item no. ERA-695 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Nitrite, potable water (PotableWatR TM) Item no. ERA-695QR Unit each 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
QuiKResponse - Residual Chlorine, potable water (PotableWatR TM) Item no. ERA-696QR 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
QuiKResponse - Metals, potable water (PotableWatR TM) Item no. ERA-697QR 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
QuiKResponse - Turbidity, potable water (PotableWatR TM) Item no. ERA-699QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Toxaphene, potable water (PotableWatR TM) Item no. ERA-700QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Halomethanes (THMs), potable water (PotableWatR TM) Item no. ERA-702QR 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
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
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
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
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
QuiKResponse - Pesticides, potable water (PotableWatR TM) Item no. ERA-709QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Surfactants-MBAS, potable water (PotableWatR TM) Item no. ERA-784QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - PCBs as Decachlorobiphenyl Item no. ERA-839 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 354 (January 12, 2026 - February 26, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 375 (October 8, 2027 - November 22, 2027) Add to cart All product details
Proficiency Testing - Unregulated Volatiles, potable water Item no. ERA-841 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 353 (December 1, 2025 - January 15, 2026)WS 354 (January 12, 2026 - February 26, 2026)WS 355 (February 9, 2026 - March 26, 2026)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 - Toxaphene, potable water Item no. ERA-844 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 353 (December 1, 2025 - January 15, 2026)WS 354 (January 12, 2026 - February 26, 2026)WS 355 (February 9, 2026 - March 26, 2026)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 - Chlordane, potable water Item no. ERA-845 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 353 (December 1, 2025 - January 15, 2026)WS 354 (January 12, 2026 - February 26, 2026)WS 355 (February 9, 2026 - March 26, 2026)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 - Carbamate/Carbamoxyloxime Pesticides Item no. ERA-846 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 353 (December 1, 2025 - January 15, 2026)WS 354 (January 12, 2026 - February 26, 2026)WS 355 (February 9, 2026 - March 26, 2026)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 - Vanadium, potable water Item no. ERA-856 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 354 (January 12, 2026 - February 26, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 375 (October 8, 2027 - November 22, 2027) Add to cart All product details
Proficiency Testing - Dioxin, potable water Item no. ERA-857 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 354 (January 12, 2026 - February 26, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 375 (October 8, 2027 - November 22, 2027) Add to cart All product details
Proficiency Testing - Uranium, potable water Item no. ERA-858 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 354 (January 12, 2026 - February 26, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 375 (October 8, 2027 - November 22, 2027) Add to cart All product details
Proficiency Testing - Color, Water Supply Item no. ERA-859C Unit 30 mL Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 354 (January 12, 2026 - February 26, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 360 (July 13, 2026 - August 27, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 375 (October 8, 2027 - November 22, 2027) Add to cart All product details