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Unregulated Contaminant Monitoring Rule (UCMR 4)

Beginning in April 2019, Fort Collins Utilities will participate in the U.S. Environmental Protection Agency’s (EPA) Unregulated Contaminant Monitoring Rule (UCMR 4). Approximately 6,000 utilities nationwide will monitor unregulated contaminants for a year to help the EPA determine the occurrence of these contaminants in drinking water and whether or not they need to be regulated in the future. EPA uses the UCMR 4 to collect data for contaminants that are suspected to be present in drinking water and do not have health-based standards set under the Safe Drinking Water Act. We are committed to protecting public health and support EPA’s research.

UCMR 4 monitoring includes monitoring for a total of 30 chemical contaminants: 10 cyanotoxins (nine cyanotoxins and one cyanotoxin group) and 20 additional contaminants (two metals, eight pesticides plus one pesticide manufacturing byproduct, three haloacetic acid [HAA] groups, three alcohols, and three semivolatile organic chemicals [SVOCs]). Learn more »  

Summary of Water Quality Testing Results* for Parameters Included in UCMR 4 Test List, 2014-2018

*This table only includes parameters that are also included in the UCMR 4 test list. View our annual Water Quality Report for details on routine water quality testing. 

Parameter Class

Parameter

Units

Mean

Treated/Untreated  Water

Metals

Manganese (Mn -Total Recoverable)

ug/L

1.45

Treated

Indicators

Total Organic Carbon (TOC) - blended / treated

mg/L

1.81

Treated

TOC - Horsetooth Reservoir (source)

mg/L

3.59

Untreated

TOC - Poudre River (source)

mg/L

3.70

Untreated

Haloacetic Acids (HAAs)

DiBromoAcetic Acid

ug/L

0.04

Treated

DiChloroAcetic Acid

ug/L

7.46

Treated

MonoBromoAcetic Acid

ug/L

0.08

Treated

MonoChloroAcetic Acid

ug/L

0.04

Treated

TriChloroAcetic Acid

ug/L

12.46

Treated

HAA5_SUM

ug/L

20.09

Treated

Emerging Contaminants

Chlorpyrifos methyl (Insecticide)

ng/L

No detection

Untreated

Dimethipin (Herbicide)

ng/L

No detection

Untreated

Ethoprop (Insecticide)

ng/L

No detection

Untreated

Oxyfluorfen (Herbicide)

ng/L

No detection

Untreated

Profenofos (Insecticide)

ng/L

No detection

Untreated

Tebuconazole (Fungicide)

ng/L

No detection

Untreated

Tribufos (Insecticide)

ng/L

No detection

Untreated

Cyanotoxins

Presence / Absence

ug/L

No detections

Treated