Testing Services

Drinking Water

UCMR3 Testing

Unregulated Contaminant Monitoring Rule 3 (UCMR3)


The third Unregulated Contaminant Monitoring Rule (UCMR3) requires monitoring for 28 chemical and 2 viral contaminants using EPA and/or consensus organization analytical methods during 2013-2015. Microbac has the capabilities to perform chemical and viral testing required by UCMR3.

Assessment Monitoring relies on analytical method technologies used by drinking water laboratories such as Microbac. For UCMR3, all Public Water Suppliers serving more than 10,000 people and 800 representative PWSs serving 10,000 or fewer people will monitor for 28 "List 1" contaminants during a 12-month period from January 2013 through December 2015.

Pre-Screen Testing relies on newer analytical methods not commonly used by drinking water laboratories. With UCMR3, EPA will select 800 representative PWSs serving 1,000 or fewer people. Of particular concern are PWSs in areas with karst or fractured bedrock, as well as in non-community water systems. These PWSs will monitor for two "List 3" viruses twice during their designated 12-month period from January 2013 through December 2015. Microbac Laboratories provides services to support "List 3" testing via a Microbac virology laboratory in Sterling, Virginia.

EPA UCMR3 Website

List of Analytes and Methods

Contaminant

CAS #

Minimum Reporting Level

Seven Volatile Organic Compounds

 

 

1,2,3-trichloropropane

96-18-4

0.03 µg/L

1,3-butadiene

106-99-0

0.1 µg/L

chloromethane (methyl chloride)

74-87-3

0.2 µg/L

1,1-dichloroethane

75-34-3

0.03 µg/L

bromomethane (methyl bromide)

74-83-9

0.2 µg/L

chlorodifluoromethane (HCFC-22)

75-45-6

0.08 µg/L

bromochloromethane (halon 1011)

74-97-5

0.06 µg/L

One Synthetic Organic Compounds

 

Minimum Reporting Level

1,4-dioxane

123-91-1

0.07 µg/L

Six Metals

 

Minimum Reporting Level

vanadium

7440-62-2

0.2 µg/L

molybdenum

7439-98-7

1 µg/L

cobalt

7440-48-4

1µg/L

strontium

7440-24-6

0.3 µg/L

Chromium

 

 

chromium3

N/A4

0.2 µg/L

chromium-6

18540-29-9

0.03 µg/L

One Oxyhalide Anion

 

Minimum Reporting Level

chlorate

14866-68-3

20µg/L

Six Perfluorinated Compounds

 

Minimum Reporting Level

perfluorooctanesulfonic sulfonate (PFOS)

1763-23-1

0.04 µg/L

perfluorooctanoic acid (PFOA)

335-67-1

0.02 µg/L

perfluorononanoic acid (PFNA)

375-95-1

0.02 µg/L

perfluorohexanesulfonic acid (PFHxS)

355-46-4

0.03 µg/L

perfluoroheptanoic acid (PFHpA)

375-85-9

0.01 µg/L

perfluorobutanesulfonic acid (PFBS)

375-73-5

0.09 µg/L

 

 

 

 

 

 

Screening Survey (List 2 Contaminants)

 

 

 

 

Contaminant

CASRegistry Number1

Minimum Reporting Level

Seven Hormones

 

 

17-β-estradiol

50-28-2

0.0004 µg/L

17-α-ethynylestradiol (ethinyl estradiol)

57-63-6

0.0009 µg/L

16-α-hydroxyestradiol (estriol)

50-27-1

0.0008 µg/L

equilin

474-86-2

0.004 µg/L

estrone

53-16-7

0.002 µg/L

testosterone

58-22-0

0.0001 µg/L

4-androstene-3,17-dione

63-05-8

0.0003 µg/L

 

 

 

 

 

 

 

 

 

Pre-Screen Testing (List 3 Contaminants)

 

 

 

 

Contaminant

CASRegistry Number1

Minimum Reporting Level

Two Viruses

 

 

enteroviruses

N/A4

0.01 – 0.05 viral particles/L for the culture assay; 
0.4- 2 viral genome copies/L for the molecular assay.

noroviruses

N/A

N/A

Notes  
1. Chemical Abstract Service (CAS) Registry Number
2. Sample Points 
a. Entry points to the distribution system (EPTDS)
b. Distribution system maximum residence time (DSMRT)
3. Monitoring for total chromium – in conjunction with UCMR 3 Assessment Monitoring – is required under the authority provided in Section 1445(a)(1)(A) of SDWA
4 Not Applicable

EPA UCMR3 Press Release - May 1, 2012