TapScore USA

Haloacetic Acids (HAA5) in Drinking Water

Reference information plus historical EPA compliance records associated with haloacetic acids (haa5).

EPA Limit (MCL)

60 ppb

EPA Goal (MCLG)

N/A ppb

Category

Disinfection Byproducts

Regulatory values are a concise reference, not legal or medical advice. Confirm the current standard and rule-specific details on EPA.gov.

Health Effects

Increased cancer risk

Common Sources

Byproduct of drinking water disinfection

Treatment Considerations for Haloacetic Acids (HAA5)

Commonly cited treatment approaches include: Activated carbon filters. Choose treatment only after a certified water test identifies the substance and concentration; verify NSF/ANSI certification and consult a qualified local professional when needed.

29,305

Historical Violation Records

8,729

Systems With Records

Historical Haloacetic Acids (HAA5) Records by State

StateRecordsSystems
Pennsylvania3,6681,166
Oklahoma3,484459
Florida2,981834
Alaska2,034168
North Carolina1,937583
Louisiana1,466347
West Virginia1,369255
Oregon1,165364
Kentucky1,004210
Ohio806421
Illinois758422
Washington672342
California626196
Puerto Rico613117
Colorado572233
Connecticut509208
New Mexico475159
Arizona466200
Montana461146
Virginia429176

Systems With the Most Haloacetic Acids (HAA5) Violation Records

KAKE MUNICIPAL WATER

415 served85 historical records
F

VILLAGE OF SIKES WATER SYSTEM

639 served79 historical records
F

BARNSDALL

1,243 served79 historical records
F

VALLENAR VIEW MOBILE HOME PARK

225 served77 historical records
F

HUDSON GAARS MILL WATER SYSTEM

660 served65 historical records
C

THORNE BAY, CITY OF

470 served63 historical records
C

HYDABURG

415 served61 historical records
F

TOWN OF FERRIDAY WATER SYSTEM

3,816 served58 historical records
F

MUSKOGEE CO. RWD #3

1,300 served57 historical records
F

OSAGE CO RWD #20 (HULAH)

350 served56 historical records
F

Frequently Asked Questions

What is Haloacetic Acids (HAA5) and why can it appear in drinking-water records?

Haloacetic Acids (HAA5) can be associated with drinking water through: Byproduct of drinking water disinfection.

What reference value does this page show?

The summarized EPA Maximum Contaminant Level is 60 ppb. Some substances use action levels or rule-specific thresholds instead, so verify the current EPA standard.

Does a historical violation record mean it is in my tap today?

No. A compliance record may be historical or resolved. Use the latest Consumer Confidence Report or a certified test for current local conditions.