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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Fairfax County Water Authority

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

400

Samples

1

Samples exceeding legal limit (MCL)

397

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201414.6 ppb80801.28 ppb - 51.3 ppb
201513.9 ppb64641.12 ppb - 42.6 ppb
201614.5 ppb6463ND - 46.1 ppb
201717.2 ppb6463ND - 54.5 ppb
201819.3 ppb6463ND - 60.5 ppb
201915.6 ppb64641.52 ppb - 51.5 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-20FW14013105-03_HA18.5 ppb
2014-02-20FW14013105-05_HA13.2 ppb
2014-02-20FW14013105-06_HA13.0 ppb
2014-02-20FW14013105-04_HA11.5 ppb
2014-02-20FW14013104-05_HA4.04 ppb
2014-02-20FW14013104-04_HA3.98 ppb
2014-02-20FW14013108-03_HA2.68 ppb
2014-02-20FW14013108-06_HA2.64 ppb
2014-02-20FW14013106-02_HA2.42 ppb
2014-02-20FW14013108-04_HA2.38 ppb
2014-02-20FW14013108-05_HA2.23 ppb
2014-02-20FW14013104-03_HA2.04 ppb
2014-02-20FW14013107-06_HA1.86 ppb
2014-02-20FW14013106-03_HA1.77 ppb
2014-02-20FW14013104-02_HA1.65 ppb
2014-02-20FW14013107-04_HA1.58 ppb
2014-02-20FW14013106-04_HA1.53 ppb
2014-02-20FW14013107-05_HA1.50 ppb
2014-02-20FW14013107-03_HA1.39 ppb
2014-02-20FW14013106-05_HA1.28 ppb
2014-05-15FW14042361-03_HA42.7 ppb
2014-05-15FW14042362-03_HA37.0 ppb
2014-05-15FW14042403-05_HA31.3 ppb
2014-05-15FW14042361-04_HA30.8 ppb
2014-05-15FW14042361-06_HA30.2 ppb
2014-05-15FW14042362-04_HA28.5 ppb
2014-05-15FW14042362-06_HA28.4 ppb
2014-05-15FW14042362-05_HA28.0 ppb
2014-05-15FW14042403-03_HA27.8 ppb
2014-05-15FW14042361-05_HA26.3 ppb
2014-05-15FW14042360-04_HA24.5 ppb
2014-05-15FW14042403-04_HA22.8 ppb
2014-05-15FW14042360-03_HA22.6 ppb
2014-05-15FW14042360-02_HA22.2 ppb
2014-05-15FW14042359-06_HA19.9 ppb
2014-05-15FW14042359-04_HA18.5 ppb
2014-05-15FW14042403-02_HA18.0 ppb
2014-05-15FW14042360-05_HA17.4 ppb
2014-05-15FW14042359-05_HA16.8 ppb
2014-05-15FW14042359-03_HA10.6 ppb
2014-08-19FW14072252-03_HA14.2 ppb
2014-08-19FW14072252-04_HA10.9 ppb
2014-08-19FW14072252-06_HA10.8 ppb
2014-08-19FW14072252-05_HA9.30 ppb
2014-08-19FW14072250-04_HA8.29 ppb
2014-08-19FW14072250-06_HA7.71 ppb
2014-08-19FW14072250-03_HA7.21 ppb
2014-08-19FW14072250-05_HA6.92 ppb
2014-08-20FW14072251-02_HA9.69 ppb
2014-08-20FW14072251-04_HA9.60 ppb
2014-08-20FW14072251-03_HA9.22 ppb
2014-08-20FW14072251-05_HA8.10 ppb
2014-08-21FW14072253-03_HA51.3 ppb
2014-08-21FW14072253-06_HA42.3 ppb
2014-08-21FW14072253-04_HA40.9 ppb
2014-08-21FW14072253-05_HA39.7 ppb
2014-08-21FW14072254-03_HA9.85 ppb
2014-08-21FW14072254-02_HA8.50 ppb
2014-08-21FW14072254-04_HA8.27 ppb
2014-08-21FW14072254-05_HA8.22 ppb
2014-11-20FW141022070-03_H39.3 ppb
2014-11-20FW141022070-06_H25.2 ppb
2014-11-20FW141022070-04_H24.5 ppb
2014-11-20FW141022070-05_H22.5 ppb
2014-11-20FW141022073-03_H11.3 ppb
2014-11-20FW141022073-06_H9.80 ppb
2014-11-20FW141022072-04_H9.78 ppb
2014-11-20FW141022073-04_H9.53 ppb
2014-11-20FW141022069-03_H9.33 ppb
2014-11-20FW141022072-06_H9.31 ppb
2014-11-20FW141022071-03_H9.24 ppb
2014-11-20FW141022073-05_H9.18 ppb
2014-11-20FW141022071-04_H8.54 ppb
2014-11-20FW141022071-02_H7.49 ppb
2014-11-20FW141022071-05_H7.44 ppb
2014-11-20FW141022069-04_H7.36 ppb
2014-11-20FW141022072-05_H7.24 ppb
2014-11-20FW141022072-03_H7.20 ppb
2014-11-20FW141022069-02_H6.88 ppb
2014-11-20FW141022069-05_H6.62 ppb
2015-02-1900125-FAIRFAX CO21.8 ppb
2015-02-1900125-FAIRFAX CO15.7 ppb
2015-02-1900125-FAIRFAX CO13.7 ppb
2015-02-1900125-FAIRFAX CO5.25 ppb
2015-02-1900125-FAIRFAX CO3.65 ppb
2015-02-1900125-FAIRFAX CO3.33 ppb
2015-02-1900125-FAIRFAX CO3.31 ppb
2015-02-1900125-FAIRFAX CO3.14 ppb
2015-02-1900125-FAIRFAX CO2.90 ppb
2015-02-1900125-FAIRFAX CO2.33 ppb
2015-02-1900125-FAIRFAX CO2.32 ppb
2015-02-1900125-FAIRFAX CO2.25 ppb
2015-02-1900125-FAIRFAX CO2.17 ppb
2015-02-1900125-FAIRFAX CO2.06 ppb
2015-02-2300125-FAIRFAX CO2.28 ppb
2015-02-2300125-FAIRFAX CO2.00 ppb
2015-05-2100125-FAIRFAX CO42.6 ppb
2015-05-2100125-FAIRFAX CO40.4 ppb
2015-05-2100125-FAIRFAX CO39.8 ppb
2015-05-2100125-FAIRFAX CO36.9 ppb
2015-05-2100125-FAIRFAX CO34.3 ppb
2015-05-2100125-FAIRFAX CO32.7 ppb
2015-05-2100125-FAIRFAX CO28.8 ppb
2015-05-2100125-FAIRFAX CO27.9 ppb
2015-05-2100125-FAIRFAX CO27.7 ppb
2015-05-2100125-FAIRFAX CO27.3 ppb
2015-05-2100125-FAIRFAX CO26.8 ppb
2015-05-2100125-FAIRFAX CO24.4 ppb
2015-05-2100125-FAIRFAX CO22.2 ppb
2015-05-2100125-FAIRFAX CO21.4 ppb
2015-05-2100125-FAIRFAX CO20.3 ppb
2015-05-2100125-FAIRFAX CO19.1 ppb
2015-08-2000125-FAIRFAX CO35.1 ppb
2015-08-2000125-FAIRFAX CO34.6 ppb
2015-08-2000125-FAIRFAX CO18.4 ppb
2015-08-2000125-FAIRFAX CO12.9 ppb
2015-08-2000125-FAIRFAX CO12.2 ppb
2015-08-2000125-FAIRFAX CO11.8 ppb
2015-08-2000125-FAIRFAX CO11.1 ppb
2015-08-2000125-FAIRFAX CO11.0 ppb
2015-08-2000125-FAIRFAX CO10.4 ppb
2015-08-2000125-FAIRFAX CO9.89 ppb
2015-08-2000125-FAIRFAX CO9.61 ppb
2015-08-2000125-FAIRFAX CO9.22 ppb
2015-08-2000125-FAIRFAX CO9.02 ppb
2015-08-2000125-FAIRFAX CO8.98 ppb
2015-08-2000125-FAIRFAX CO8.90 ppb
2015-08-2000125-FAIRFAX CO2.99 ppb
2015-11-2000125-FAIRFAX CO20.8 ppb
2015-11-2000125-FAIRFAX CO10.6 ppb
2015-11-2000125-FAIRFAX CO10.6 ppb
2015-11-2000125-FAIRFAX CO8.03 ppb
2015-11-2000125-FAIRFAX CO8.01 ppb
2015-11-2000125-FAIRFAX CO6.91 ppb
2015-11-2000125-FAIRFAX CO6.89 ppb
2015-11-2000125-FAIRFAX CO6.24 ppb
2015-11-2000125-FAIRFAX CO6.20 ppb
2015-11-2000125-FAIRFAX CO5.70 ppb
2015-11-2000125-FAIRFAX CO5.45 ppb
2015-11-2000125-FAIRFAX CO5.43 ppb
2015-11-2000125-FAIRFAX CO5.20 ppb
2015-11-2000125-FAIRFAX CO5.03 ppb
2015-11-2000125-FAIRFAX CO3.40 ppb
2015-11-2000125-FAIRFAX CO1.12 ppb
2016-02-18FW160107017-02_H44.4 ppb
2016-02-18FW160107017-06_H14.0 ppb
2016-02-18FW160107017-05_H13.5 ppb
2016-02-18FW160107020-03_H6.10 ppb
2016-02-18FW160107020-04_H5.53 ppb
2016-02-18FW160107020-05_H5.24 ppb
2016-02-18FW160107019-06_H4.53 ppb
2016-02-18FW160107019-04_H2.91 ppb
2016-02-18FW160107019-05_H2.66 ppb
2016-02-18FW160107020-06_H2.46 ppb
2016-02-18FW160107018-05_H2.37 ppb
2016-02-18FW160107018-03_H2.17 ppb
2016-02-18FW160107019-02_H2.08 ppb
2016-02-18FW160107019-03_H1.93 ppb
2016-02-18FW160107018-06_H1.90 ppb
2016-02-18FW160107018-04_H1.87 ppb
2016-05-19FW160422020-02_H43.5 ppb
2016-05-19FW160422018-03_H43.1 ppb
2016-05-19FW160422020-06_H30.3 ppb
2016-05-19FW160422018-04_H28.7 ppb
2016-05-19FW160422019-05_H28.1 ppb
2016-05-19FW160422020-05_H27.8 ppb
2016-05-19FW160422018-05_H27.4 ppb
2016-05-19FW160422019-03_H24.9 ppb
2016-05-19FW160422081-05_H24.0 ppb
2016-05-19FW160422019-04_H22.9 ppb
2016-05-19FW160422018-06_H20.4 ppb
2016-05-19FW160422019-06_H19.5 ppb
2016-05-19FW160422019-02_H18.7 ppb
2016-05-19FW160422081-03_H16.0 ppb
2016-05-19FW160422081-04_H13.5 ppb
2016-05-19FW160422081-06_H8.51 ppb
2016-08-16FW160725088-04_H15.1 ppb
2016-08-16FW160725088-03_H13.9 ppb
2016-08-16FW160725088-06_H12.8 ppb
2016-08-16FW160725088-05_H12.6 ppb
2016-08-17FW160725089-03_H12.8 ppb
2016-08-17FW160725089-06_H12.4 ppb
2016-08-17FW160725089-04_H11.6 ppb
2016-08-17FW160725089-05_H11.4 ppb
2016-08-18FW160725086-02_H46.1 ppb
2016-08-18FW160725086-06_H39.2 ppb
2016-08-18FW160725086-05_H32.3 ppb
2016-08-18FW160725087-03_H15.2 ppb
2016-08-18FW160725087-04_H15.2 ppb
2016-08-18FW160725087-05_H14.8 ppb
2016-08-18FW160725087-02_H14.6 ppb
2016-08-18FW160725087-06_H11.1 ppb
2016-11-17FW161018088-06_H10.00 ppb
2016-11-17FW161018091-05_H9.52 ppb
2016-11-17FW161018092-03_H9.47 ppb
2016-11-17FW161018093-03_H9.35 ppb
2016-11-17FW161018088-05_H9.16 ppb
2016-11-17FW161018091-02_H8.95 ppb
2016-11-17FW161018091-03_H8.81 ppb
2016-11-17FW161018092-05_H8.80 ppb
2016-11-17FW161018093-06_H8.76 ppb
2016-11-17FW161018092-04_H7.55 ppb
2016-11-17FW161018093-05_H7.30 ppb
2016-11-17FW161018093-04_H7.23 ppb
2016-11-17FW161018091-04_H7.09 ppb
2016-11-17FW161018092-06_H7.03 ppb
2016-11-17FW161018091-06_H6.54 ppb
2016-11-17FW161018088-02_HND
2017-02-15FW170126080-03_H4.88 ppb
2017-02-15FW170126080-05_H4.87 ppb
2017-02-15FW170126080-04_H4.52 ppb
2017-02-15FW170126080-06_H4.16 ppb
2017-02-16FW170126078-02_H16.1 ppb
2017-02-16FW170126078-05_H14.5 ppb
2017-02-16FW170126078-06_H12.5 ppb
2017-02-16FW170126081-03_H8.16 ppb
2017-02-16FW170126081-06_H7.31 ppb
2017-02-16FW170126081-04_H6.86 ppb
2017-02-16FW170126081-05_H6.43 ppb
2017-02-16FW170126079-04_H5.80 ppb
2017-02-16FW170126079-06_H5.43 ppb
2017-02-16FW170126079-05_H5.41 ppb
2017-02-16FW170126079-03_H5.09 ppb
2017-02-16FW170126079-02_H4.85 ppb
2017-05-18FW170426070-03_H54.5 ppb
2017-05-18FW170426069-04_H52.0 ppb
2017-05-18FW170426070-04_H49.0 ppb
2017-05-18FW170426069-05_H44.8 ppb
2017-05-18FW170426069-06_H40.1 ppb
2017-05-18FW170426070-05_H36.1 ppb
2017-05-18FW170426069-03_H35.7 ppb
2017-05-18FW170426070-06_H34.7 ppb
2017-05-18FW170426068-05_H34.5 ppb
2017-05-18FW170426071-06_H34.2 ppb
2017-05-18FW170426068-03_H33.6 ppb
2017-05-18FW170426069-02_H32.0 ppb
2017-05-18FW170426071-05_H29.7 ppb
2017-05-18FW170426068-04_H29.2 ppb
2017-05-18FW170426071-02_H25.3 ppb
2017-05-18FW170426068-06_H19.2 ppb
2017-08-17FW170710006-06_H24.7 ppb
2017-08-17FW170710006-05_H20.2 ppb
2017-08-17FW170710009-03_H16.5 ppb
2017-08-17FW170710008-04_H14.8 ppb
2017-08-17FW170710009-05_H14.5 ppb
2017-08-17FW170710009-06_H14.5 ppb
2017-08-17FW170710008-02_H14.3 ppb
2017-08-17FW170710008-03_H14.0 ppb
2017-08-17FW170710009-04_H13.9 ppb
2017-08-17FW170710008-05_H13.8 ppb
2017-08-17FW170710007-03_H13.6 ppb
2017-08-17FW170710008-06_H13.3 ppb
2017-08-17FW170710007-05_H12.6 ppb
2017-08-17FW170710007-04_H11.9 ppb
2017-08-17FW170710007-06_H11.1 ppb
2017-08-17FW170710006-02_H3.96 ppb
2017-11-15FW171025015-05_H11.3 ppb
2017-11-15FW171025015-04_H11.2 ppb
2017-11-15FW171025015-02_H9.64 ppb
2017-11-15FW171025015-03_H8.97 ppb
2017-11-15FW171025015-06_H7.24 ppb
2017-11-16FW171025014-06_H27.9 ppb
2017-11-16FW171025014-05_H24.2 ppb
2017-11-16FW171025017-03_H11.3 ppb
2017-11-16FW171025016-05_H9.62 ppb
2017-11-16FW171025017-05_H9.47 ppb
2017-11-16FW171025017-04_H9.34 ppb
2017-11-16FW171025016-03_H9.21 ppb
2017-11-16FW171025017-06_H9.00 ppb
2017-11-16FW171025016-04_H8.06 ppb
2017-11-16FW171025016-06_H7.82 ppb
2017-11-16FW171025014-02_HND
2018-02-15FW180118004-02_H3.28 ppb
2018-02-15FW180118004-05_H25.1 ppb
2018-02-15FW180118004-06_H6.48 ppb
2018-02-15FW180118005-02_H6.17 ppb
2018-02-15FW180118005-03_H6.14 ppb
2018-02-15FW180118005-04_H6.38 ppb
2018-02-15FW180118005-05_H6.79 ppb
2018-02-15FW180118005-06_H6.42 ppb
2018-02-15FW180118007-03_H6.19 ppb
2018-02-15FW180118007-04_H7.20 ppb
2018-02-15FW180118007-05_H5.91 ppb
2018-02-15FW180118007-06_H8.40 ppb
2018-02-15FW180118008-03_H8.66 ppb
2018-02-15FW180118008-04_H8.06 ppb
2018-02-15FW180118008-05_H6.59 ppb
2018-02-15FW180118008-06_H8.23 ppb
2018-05-15FW180424082-02_H2.65 ppb
2018-05-15FW180424082-05_H38.9 ppb
2018-05-15FW180424082-06_H25.8 ppb
2018-05-15FW180424083-02_H37.3 ppb
2018-05-15FW180424083-03_H32.5 ppb
2018-05-15FW180424083-04_H33.6 ppb
2018-05-15FW180424083-05_H32.9 ppb
2018-05-15FW180424083-06_H34.4 ppb
2018-05-15FW180424084-03_H36.5 ppb
2018-05-15FW180424084-04_H34.0 ppb
2018-05-15FW180424084-05_H39.0 ppb
2018-05-15FW180424084-06_H16.3 ppb
2018-05-15FW180424085-03_H60.5 ppb
2018-05-15FW180424085-04_H58.3 ppb
2018-05-15FW180424085-05_H40.6 ppb
2018-05-15FW180424085-06_H48.0 ppb
2018-08-16FW180716080-02_H1.48 ppb
2018-08-16FW180716080-05_H53.5 ppb
2018-08-16FW180716080-06_H18.0 ppb
2018-08-16FW180716081-02_H19.4 ppb
2018-08-16FW180716081-03_H19.7 ppb
2018-08-16FW180716081-04_H31.4 ppb
2018-08-16FW180716081-05_H24.5 ppb
2018-08-16FW180716081-06_H19.9 ppb
2018-08-16FW180716082-03_H19.3 ppb
2018-08-16FW180716082-04_H18.7 ppb
2018-08-16FW180716082-05_H21.3 ppb
2018-08-16FW180716082-06_H17.2 ppb
2018-08-16FW180716083-03_H38.2 ppb
2018-08-16FW180716083-04_H28.0 ppb
2018-08-16FW180716083-05_H24.6 ppb
2018-08-16FW180716083-06_H20.0 ppb
2018-11-16FW181023084-02_HND
2018-11-16FW181023084-05_H25.5 ppb
2018-11-16FW181023084-06_H7.20 ppb
2018-11-16FW181023085-02_H8.89 ppb
2018-11-16FW181023085-03_H8.28 ppb
2018-11-16FW181023085-04_H9.16 ppb
2018-11-16FW181023085-05_H9.48 ppb
2018-11-16FW181023085-06_H7.78 ppb
2018-11-16FW181023086-03_H12.6 ppb
2018-11-16FW181023086-04_H12.0 ppb
2018-11-16FW181023086-05_H10.6 ppb
2018-11-16FW181023086-06_H9.93 ppb
2018-11-16FW181023087-03_H16.0 ppb
2018-11-16FW181023087-04_H9.72 ppb
2018-11-16FW181023087-05_H9.34 ppb
2018-11-16FW181023087-06_H6.78 ppb
2019-02-21FW190124015-02_H18.2 ppb
2019-02-21FW190124015-05_H15.7 ppb
2019-02-21FW190124015-06_H5.98 ppb
2019-02-21FW190124016-02_H5.99 ppb
2019-02-21FW190124016-03_H6.13 ppb
2019-02-21FW190124016-04_H3.34 ppb
2019-02-21FW190124016-05_H2.59 ppb
2019-02-21FW190124016-06_H2.80 ppb
2019-02-21FW190124017-03_H4.41 ppb
2019-02-21FW190124017-04_H3.93 ppb
2019-02-21FW190124017-05_H4.54 ppb
2019-02-21FW190124017-06_H4.07 ppb
2019-02-21FW190124018-03_H3.00 ppb
2019-02-21FW190124018-04_H2.98 ppb
2019-02-21FW190124018-05_H2.90 ppb
2019-02-21FW190124018-06_H2.86 ppb
2019-05-16FW190422088-02_H6.15 ppb
2019-05-16FW190422088-05_H36.9 ppb
2019-05-16FW190422088-06_H31.3 ppb
2019-05-16FW190422089-02_H41.2 ppb
2019-05-16FW190422089-03_H45.7 ppb
2019-05-16FW190422089-04_H47.2 ppb
2019-05-16FW190422089-05_H20.5 ppb
2019-05-16FW190422089-06_H38.6 ppb
2019-05-16FW190422090-03_H50.9 ppb
2019-05-16FW190422090-04_H39.4 ppb
2019-05-16FW190422090-05_H51.2 ppb
2019-05-16FW190422090-06_H21.0 ppb
2019-05-16FW190422091-03_H51.5 ppb
2019-05-16FW190422091-04_H40.7 ppb
2019-05-16FW190422091-05_H33.3 ppb
2019-05-16FW190422091-06_H38.1 ppb
2019-08-15FW190725077-02_H4.42 ppb
2019-08-15FW190725077-05_H40.7 ppb
2019-08-15FW190725077-06_H11.8 ppb
2019-08-15FW190725078-02_H12.9 ppb
2019-08-15FW190725078-03_H12.2 ppb
2019-08-15FW190725078-04_H11.5 ppb
2019-08-15FW190725078-05_H10.1 ppb
2019-08-15FW190725078-06_H11.5 ppb
2019-08-15FW190725079-03_H11.6 ppb
2019-08-15FW190725079-04_H11.2 ppb
2019-08-15FW190725079-05_H11.2 ppb
2019-08-15FW190725079-06_H9.41 ppb
2019-08-15FW190725080-03_H14.1 ppb
2019-08-15FW190725080-04_H11.5 ppb
2019-08-15FW190725080-05_H12.0 ppb
2019-08-15FW190725080-06_H12.6 ppb
2019-11-20FW191029073-02_H1.52 ppb
2019-11-20FW191029073-05_H10.2 ppb
2019-11-20FW191029073-06_H6.07 ppb
2019-11-20FW191029074-02_H7.28 ppb
2019-11-20FW191029074-03_H8.03 ppb
2019-11-20FW191029074-04_H7.91 ppb
2019-11-20FW191029074-05_H5.14 ppb
2019-11-20FW191029074-06_H6.98 ppb
2019-11-20FW191029075-03_H8.17 ppb
2019-11-20FW191029075-04_H7.02 ppb
2019-11-20FW191029075-05_H7.67 ppb
2019-11-20FW191029075-06_H5.25 ppb
2019-11-20FW191029076-03_H7.93 ppb
2019-11-20FW191029076-04_H6.53 ppb
2019-11-20FW191029076-05_H5.82 ppb
2019-11-20FW191029076-06_H6.07 ppb