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Corporate Overview

The Standard - August 2019

Proposed Limit on Perchlorate in Drinking Water

The United States Environmental Protection Agency (US EPA) has proposed a maximum contaminant level (MCL) of 56 parts per billion (ppb) of perchlorate in drinking water. In addition to this proposal, three other regulatory options for perchlorate have been proposed: an MCL of 18 ppb, an MCL of 90 ppb, or no regulation at all.

Perchlorate is commonly used as an oxidizer in munitions, fireworks, rocket propellants, and airbag initiators in vehicles, signal flares, and matches. It was first classified as a contaminant under the Safe Drinking Water Act criteria in 2011 due to its known presence in public drinking water systems and potential risk to public health. Since then, a comprehensive review by the EPA has been underway to understand the potential risks and need for regulations of perchlorate in drinking water. Read more about the latest developments here.

Perchlorate in Drinking Water. US EPA Proposed Rule.

CIL offers a pair of perchloric acid standards along with related products, potassium chlorate and potassium bromate.

Featured Products

Catalog No. Description Concentration Amount
OLM-7310-1.2 Perchloric acid, sodium salt (18O4, 90%+) 100 µg/mL in water 1.2 mL
ULM-7312-1.2 Perchloric acid, sodium salt (unlabeled) 100 µg/mL in water 1.2 mL


Related Products

OLM-10485-1.2 Potassium chlorate (18O3, 98%) CP 90-95% 100 µg/mL in 18O-water 1.2 mL
ULM-10486-1.2 Potassium chlorate (unlabeled) 100 µg/mL in 18O-water 1.2 mL
OLM-8283-18O-1.2 Potassium bromate (18O3, 98%) CP 90-95% 100 µg/mL in 18O-water 1.2 mL
ULM-8451-1.2 Potassium bromate (unlabeled) 100 µg/mL in water 1.2 mL


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stable isotope, stable isotope labeled compounds, environmental contaminant standards
CIL has been ready to help with the analytical standards critical to the task of defining and resolving any major environmental contamination problems.