Know Your Environment. Protect Your Health.

Perfluorohexanoic Acid (PFHxA)

Littleton Water Department

Perfluorohexanoic acid is a member of a group of perfluorinated chemicals used in many consumer products. Perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.

 

149

Samples

0

Samples exceeding legal limit (MCL)

123

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
20191.98 ppt74ND - 4.73 ppt
20202.65 ppt17171.000 ppt - 4.20 ppt
20212.54 ppt36361.30 ppt - 6.46 ppt
20222.24 ppt5145ND - 5.18 ppt
20232.35 ppt3736ND - 4.83 ppt
2024ND10ND

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1,000 ppt

The EWG Health Guideline of 1,000 ppt for perfluorohexanoic acid was defined by EPA's toxicity value published in the Integrated Risk Information System's toxicological review. This health guideline protects against harm to fetal growth and child development.

ppt = parts per trillion

All test results

Date Result
2019-06-194.50 ppt
2019-08-06ND
2019-08-063.97 ppt
2019-08-06ND
2019-08-06ND
2019-09-234.73 ppt
2019-12-090.680 ppt
2020-07-281.70 ppt
2020-07-283.20 ppt
2020-07-282.30 ppt
2020-10-152.24 ppt
2020-10-153.20 ppt
2020-10-151.54 ppt
2020-10-151.49 ppt
2020-10-151.93 ppt
2020-10-151.000 ppt
2020-10-153.34 ppt
2020-10-153.31 ppt
2020-11-043.06 ppt
2020-11-042.50 ppt
2020-11-043.49 ppt
2020-12-024.20 ppt
2020-12-023.43 ppt
2020-12-023.06 ppt
2021-01-123.20 ppt
2021-01-121.75 ppt
2021-01-122.72 ppt
2021-02-084.35 ppt
2021-02-081.82 ppt
2021-02-082.65 ppt
2021-03-173.02 ppt
2021-03-173.83 ppt
2021-03-172.29 ppt
2021-04-052.51 ppt
2021-04-053.27 ppt
2021-04-052.08 ppt
2021-05-122.55 ppt
2021-05-121.78 ppt
2021-05-122.18 ppt
2021-06-082.38 ppt
2021-06-081.84 ppt
2021-06-082.84 ppt
2021-07-212.08 ppt
2021-07-211.65 ppt
2021-07-212.49 ppt
2021-09-082.31 ppt
2021-09-082.01 ppt
2021-09-083.58 ppt
2021-10-063.16 ppt
2021-10-062.46 ppt
2021-10-061.77 ppt
2021-10-136.46 ppt
2021-10-211.38 ppt
2021-10-281.96 ppt
2021-11-152.47 ppt
2021-11-151.90 ppt
2021-11-153.24 ppt
2021-12-141.30 ppt
2021-12-142.41 ppt
2021-12-141.77 ppt
2022-01-111.73 ppt
2022-01-112.16 ppt
2022-01-111.24 ppt
2022-01-18ND
2022-02-16ND
2022-02-162.46 ppt
2022-02-161.97 ppt
2022-03-162.77 ppt
2022-03-162.13 ppt
2022-03-16ND
2022-04-203.70 ppt
2022-04-203.49 ppt
2022-04-25ND
2022-04-271.60 ppt
2022-05-163.90 ppt
2022-05-163.02 ppt
2022-05-180.810 ppt
2022-05-180.822 ppt
2022-05-180.790 ppt
2022-06-222.35 ppt
2022-06-221.67 ppt
2022-06-222.39 ppt
2022-06-221.41 ppt
2022-07-132.08 ppt
2022-07-130.679 ppt
2022-07-132.32 ppt
2022-07-133.23 ppt
2022-07-133.39 ppt
2022-07-131.44 ppt
2022-08-031.07 ppt
2022-08-031.66 ppt
2022-08-033.72 ppt
2022-08-032.60 ppt
2022-09-264.11 ppt
2022-09-263.63 ppt
2022-09-27ND
2022-09-27ND
2022-10-193.14 ppt
2022-10-195.18 ppt
2022-10-193.96 ppt
2022-10-271.09 ppt
2022-10-270.692 ppt
2022-10-270.938 ppt
2022-11-073.92 ppt
2022-11-074.62 ppt
2022-11-091.66 ppt
2022-11-093.31 ppt
2022-12-203.73 ppt
2022-12-203.76 ppt
2022-12-205.03 ppt
2022-12-202.80 ppt
2023-01-034.38 ppt
2023-01-033.28 ppt
2023-01-240.660 ppt
2023-01-242.11 ppt
2023-01-240.799 ppt
2023-01-24ND
2023-02-011.94 ppt
2023-02-013.22 ppt
2023-03-070.991 ppt
2023-03-071.94 ppt
2023-04-181.31 ppt
2023-04-182.46 ppt
2023-04-181.46 ppt
2023-04-181.25 ppt
2023-05-172.94 ppt
2023-05-173.80 ppt
2023-05-171.31 ppt
2023-06-162.44 ppt
2023-06-161.58 ppt
2023-07-250.661 ppt
2023-07-250.917 ppt
2023-07-254.35 ppt
2023-07-250.845 ppt
2023-07-253.22 ppt
2023-07-252.01 ppt
2023-08-213.47 ppt
2023-08-211.52 ppt
2023-09-193.98 ppt
2023-09-194.56 ppt
2023-10-032.56 ppt
2023-10-033.33 ppt
2023-10-033.92 ppt
2023-10-123.24 ppt
2023-11-282.90 ppt
2023-11-284.83 ppt
2023-11-281.80 ppt
2023-12-190.938 ppt
2024-07-17ND