Clean & Simple

Update: Follow this link for the Fifth Unregulated Contaminant Monitoring Rule (UCMR 5)


Fourth Unregulated Contaminant Monitoring Rule (UCMR 4)

As a single-source testing partner, depend on our personalized service to usher you through the complete scope of UCMR 4 required testing. A dedicated, hands-on point of contact will provide transparency to your shipping, testing and automated reporting needs.

Leveraging our expertise in chemical and microbiological testing of drinking water, Microbac has been accepted into the EPA’s laboratory approval process and has gained approval for the complete set of required EPA methods to test all 30 contaminants.

Every 5 years the EPA identifies emerging water contaminants to be monitored by all large public water systems (> 10,000 customers) and a representative set of small water systems. The study’s results provide input for future regulatory requirements to ensure the safety of our public drinking water.

Easier Than Ever

We understand the required work and complexity the UCMR 4 program places on your organization and are committed to make it simple – from start to finish. Microbac’s UCMR 4 analysis kit is custom designed for complete, convenient EPA-required testing. Sample bottles will be sent to you pre-labeled and our simple 5-step process ensures ideal service and ease to keep you in compliance.

Below classifies the contaminants by approved test method. Testing for Cyanotoxins will occur during a 4-consecutive month period from March 2018 through November 2020. Testing for the additional 20 chemicals will occur during a 12-month period from January 2018 through December 2020.



10 Cyanotoxins


Total microcystin

Adda ELISA, EPA 546


EPA 544

Anatoxin & Cylindrospermopsin                           

EPA 545

20 Additional Chemicals


Metals: Germanium & Manganese

EPA 200.8

Pesticides & pesticide byproduct

EPA 525.3


EPA 541


EPA 530

Brominated Haloacetics

EPA 552.3 or EPA 557

Total organic carbon

SM 5310 C


EPA 300.1

Visit the EPA website for complete program information. 


Let's discuss your UCMR 4 requirements in more detail.






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