UCMR4

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Edge Analytical is approved by the EPA for UCMR4 testing. Certificate Of Approval


All information on UCMR4 is referenced from www.epa.gov

For more information:
UCMR4 Information 
UCMR4 General Fact Sheet  PDF


UCMR4 Contaminants

10 Cyanotoxins (Nine Cyanotoxins and One Cyanotoxin Group)

• Total Microcystins
• Microcystin-LA
• Microcystin-RR
• Microcystin-LF
• Microystin-YR
• Microcystin-LR
• Microcystin-LY
• Modularin
• Cylindrospermopsin
• Antoxin-a

20 Additional Contaminants

• Germanium
• Manganese
• Alphahexachlorocyclohexane
• Profenofos
• Chlorpyrifos
• Tebuconazole
• Dimethipin
• Total Permethrin (cis – & trans-)
• Ethoprop
• Tribufos
• Oxyfluorfen
• HAA5*
• HAA6Br*
• HAA9*
• 1-Butanol
• 2-Propen-1-ol
• 2-Methoxyethanol
• Butylated Hydroxyanisole
• 0-toluidine
• Quinoline

*HAA5 (dibromoacetic acid, dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, trichloroacetic acid); HAA6Br (bromochloroacetic acid, bromodichloroacetic acid, dibromoacetic acid, chlorodibromoacetic acid, monobromoacetic acid, tribromoacetic acid); HAA9 (bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, dibromoacetic acid, dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, tribromoacetic acid, and trichloroacetic acid).

Those systems that are required to test for HAA5 under the D/DBPRs can use the HAA9 results for their compliance monitoring using the UCMR4 samples.


Who will participate

All community water systems (CWSs) and non-transient noncommunity water systems (NTNCWSs) serving more than 10,000 people (i.e., large systems) are required to monitor.

Of the CWSs and NTNCWSs serving 10,000 or fewer people (i.e., small systems):
• A nationally representative set of 800 randomly selected SW and GWUDI small systems will monitor for cyanotoxins.
• A different set of 800 randomly selected small systems will monitor for the 20 additional contaminants.


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