Know Your Environment. Protect Your Health.

Monochloroacetic acid

Regional Water Authority

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

292

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.86 ppb48480.900 ppb - 5.90 ppb
20191.54 ppb4847ND - 3.30 ppb
20202.38 ppb5049ND - 5.40 ppb
20211.88 ppb4948ND - 3.37 ppb
20222.83 ppb4948ND - 5.92 ppb
20233.42 ppb48480.990 ppb - 8.37 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a public health goal. This health guideline protects against change to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-06DBP 2004892682.00 ppb
2018-03-06DBP 2004892752.90 ppb
2018-03-06DBP 2004892872.60 ppb
2018-03-07DBP 2004895374.80 ppb
2018-03-07DBP 2004895382.80 ppb
2018-03-07DBP 2004895394.40 ppb
2018-03-07DBP 2004895403.20 ppb
2018-03-07DBP 2004895412.00 ppb
2018-03-08DBP 2004895653.40 ppb
2018-03-09DBP 2004897013.70 ppb
2018-03-09DBP 2004897024.10 ppb
2018-03-09DBP 2004897031.80 ppb
2018-06-05DBP 2004959842.60 ppb
2018-06-05DBP 2004959893.20 ppb
2018-06-05DBP 2004960023.00 ppb
2018-06-06DBP 2004962353.20 ppb
2018-06-07DBP 2004963752.60 ppb
2018-06-07DBP 2004963763.00 ppb
2018-06-07DBP 2004964175.90 ppb
2018-06-08DBP 2004965073.40 ppb
2018-06-08DBP 2004965082.80 ppb
2018-06-08DBP 2004965094.70 ppb
2018-06-08DBP 2004965104.20 ppb
2018-06-08DBP 2004965112.30 ppb
2018-09-04DBP 2005037323.10 ppb
2018-09-04DBP 2005037370.900 ppb
2018-09-04DBP 2005038422.50 ppb
2018-09-04DBP 2005039122.20 ppb
2018-09-04DBP 2005039132.70 ppb
2018-09-04DBP 2005039142.80 ppb
2018-09-05DBP 2005039813.40 ppb
2018-09-05DBP 2005040862.70 ppb
2018-09-05DBP 2005040871.30 ppb
2018-09-06DBP 2005041850.900 ppb
2018-09-06DBP 2005042111.000 ppb
2018-09-07DBP 2005044413.80 ppb
2018-12-03DBP 2005143721.30 ppb
2018-12-03DBP 2005144061.60 ppb
2018-12-04DBP 2005144472.70 ppb
2018-12-04DBP 2005144522.90 ppb
2018-12-04DBP 2005146253.10 ppb
2018-12-04DBP 2005146263.50 ppb
2018-12-04DBP 2005146272.40 ppb
2018-12-04DBP 2005146282.50 ppb
2018-12-04DBP 2005146292.60 ppb
2018-12-05DBP 2005149523.10 ppb
2018-12-06DBP 2005150692.70 ppb
2018-12-06DBP 2005150702.80 ppb
2019-03-04DBP 2005232150.700 ppb
2019-03-04DBP 2005232170.900 ppb
2019-03-05DBP 2005232620.800 ppb
2019-03-05DBP 2005232691.10 ppb
2019-03-05DBP 2005234562.00 ppb
2019-03-05DBP 2005234572.40 ppb
2019-03-05DBP 2005234581.60 ppb
2019-03-05DBP 2005234591.60 ppb
2019-03-05DBP 2005234631.70 ppb
2019-03-07DBP 2005238841.20 ppb
2019-03-08DBP 2005240000.800 ppb
2019-03-08DBP 2005240021.30 ppb
2019-06-03DBP 2005343731.50 ppb
2019-06-03DBP 2005344142.80 ppb
2019-06-04DBP 2005344911.80 ppb
2019-06-04DBP 2005344961.90 ppb
2019-06-04DBP 2005346001.60 ppb
2019-06-04DBP 2005347252.70 ppb
2019-06-04DBP 2005347272.40 ppb
2019-06-04DBP 2005347292.80 ppb
2019-06-05DBP 2005350392.10 ppb
2019-06-05DBP 2005350411.90 ppb
2019-06-06DBP 2005351971.60 ppb
2019-06-07DBP 2005353571.50 ppb
2019-09-03DBP 2005469881.60 ppb
2019-09-03DBP 200546993ND
2019-09-04DBP 2005474001.80 ppb
2019-09-04DBP 2005474021.40 ppb
2019-09-04DBP 2005474031.60 ppb
2019-09-04DBP 2005474041.10 ppb
2019-09-04DBP 2005474051.30 ppb
2019-09-05DBP 2005474603.30 ppb
2019-09-05DBP 2005476671.10 ppb
2019-09-06DBP 2005478261.40 ppb
2019-09-06DBP 2005478271.30 ppb
2019-09-06DBP 2005478281.50 ppb
2019-12-02DBP 2005584051.50 ppb
2019-12-02DBP 2005584060.900 ppb
2019-12-02DBP 2005584072.00 ppb
2019-12-03DBP 2005584541.30 ppb
2019-12-03DBP 2005584591.70 ppb
2019-12-03DBP 2005586121.20 ppb
2019-12-04DBP 2005589161.10 ppb
2019-12-04DBP 2005589171.30 ppb
2019-12-04DBP 2005589191.60 ppb
2019-12-05DBP 2005590731.30 ppb
2019-12-05DBP 2005590980.800 ppb
2019-12-06DBP 2005591951.000 ppb
2020-03-02DBP 2005677131.70 ppb
2020-03-02DBP 2005677143.00 ppb
2020-03-02DBP 2005677152.40 ppb
2020-03-02DBP 2005677180.900 ppb
2020-03-03DBP 2005677801.60 ppb
2020-03-03DBP 2005677872.50 ppb
2020-03-03DBP 2005679201.60 ppb
2020-03-03DBP 2005679211.60 ppb
2020-03-04DBP 2005681772.10 ppb
2020-03-04DBP 2005681781.60 ppb
2020-03-05DBP 200568285ND
2020-03-05DBP 2005683841.10 ppb
2020-03-12DBP 2005691641.50 ppb
2020-06-01DBP 2005772643.20 ppb
2020-06-01DBP 2005772655.20 ppb
2020-06-01DBP 2005772663.10 ppb
2020-06-02DBP 2005773183.90 ppb
2020-06-02DBP 2005773272.90 ppb
2020-06-02DBP 2005773993.90 ppb
2020-06-02DBP 2005774014.00 ppb
2020-06-03DBP 2005777195.40 ppb
2020-06-03DBP 2005777214.50 ppb
2020-06-04DBP 2005779543.10 ppb
2020-06-04DBP 2005779553.80 ppb
2020-06-05DBP 2005780774.00 ppb
2020-09-08DBP 2005891092.00 ppb
2020-09-08DBP 2005891182.20 ppb
2020-09-08DBP 2005892522.10 ppb
2020-09-08DBP 2005892532.00 ppb
2020-09-08DBP 2005892541.60 ppb
2020-09-09DBP 2005895602.40 ppb
2020-09-09DBP 2005895612.90 ppb
2020-09-10DBP 2005897971.50 ppb
2020-09-10DBP 2005897991.80 ppb
2020-09-10DBP 2005898031.70 ppb
2020-09-10DBP 2005898061.60 ppb
2020-09-11DBP 2005898682.90 ppb
2020-12-07DBP 2006001362.40 ppb
2020-12-07DBP 2006001372.50 ppb
2020-12-08DBP 2006003261.80 ppb
2020-12-08DBP 2006004072.10 ppb
2020-12-08DBP 2006004082.60 ppb
2020-12-09DBP 2006005621.000 ppb
2020-12-09DBP 2006006071.40 ppb
2020-12-09DBP 2006006532.60 ppb
2020-12-09DBP 2006006561.60 ppb
2020-12-10DBP 2006008822.40 ppb
2020-12-10DBP 2006008841.60 ppb
2020-12-10DBP 200600884B1.60 ppb
2020-12-11DBP 2006009541.90 ppb
2021-03-08DBP 2006088091.60 ppb
2021-03-08DBP 2006088351.10 ppb
2021-03-08DBP 2006088361.40 ppb
2021-03-08DBP 2006088370.700 ppb
2021-03-09DBP 2006089140.800 ppb
2021-03-09DBP 2006090891.40 ppb
2021-03-09DBP 2006090900.900 ppb
2021-03-09DBP 2006090931.40 ppb
2021-03-10DBP 2006092510.900 ppb
2021-03-10DBP 2006092521.30 ppb
2021-03-11DBP 200609420ND
2021-03-11DBP 2006095121.70 ppb
2021-03-12DBP 2006095842.40 ppb
2021-06-07DBP 2006196792.90 ppb
2021-06-07DBP 2006196801.80 ppb
2021-06-07DBP 2006196782.90 ppb
2021-06-08DBP 2006198001.90 ppb
2021-06-08DBP 2006198021.90 ppb
2021-06-08DBP 2006199202.30 ppb
2021-06-08DBP 2006199211.70 ppb
2021-06-08DBP 2006199222.60 ppb
2021-06-09DBP 2006201732.80 ppb
2021-06-10DBP 2006204932.10 ppb
2021-06-10DBP 2006204951.60 ppb
2021-06-11DBP 2006205832.20 ppb
2021-09-13300057530 3000575312.51 ppb
2021-09-13300057533 3000575342.43 ppb
2021-09-13300057536 3000575371.56 ppb
2021-09-14300058253 3000582561.51 ppb
2021-09-14300058258 3000582611.51 ppb
2021-09-14300059322 3000593251.71 ppb
2021-09-14300059327 3000593281.45 ppb
2021-09-14300059398 3000593991.83 ppb
2021-09-15300060630 3000606311.54 ppb
2021-09-16300061467 3000614682.29 ppb
2021-09-16300061470 3000614711.79 ppb
2021-09-17300062097 3000620982.25 ppb
2021-12-13D300117139 3001171403.37 ppb
2021-12-13D300117142 3001171432.87 ppb
2021-12-13D300117145 3001171462.34 ppb
2021-12-13D300117148 3001171492.36 ppb
2021-12-13D300118224 3001182271.81 ppb
2021-12-13D300118229 3001182301.95 ppb
2021-12-14D300117272 3001172752.36 ppb
2021-12-14D300117277 3001172803.08 ppb
2021-12-15D300119211 3001192121.63 ppb
2021-12-16D300120051 3001200522.60 ppb
2021-12-16D300120054 3001200552.27 ppb
2021-12-17D300120678 3001206790.970 ppb
2022-03-07D300153474 3001534751.69 ppb
2022-03-07D300153477 3001534782.25 ppb
2022-03-07D300153480 3001534810.850 ppb
2022-03-08D300153988 3001539911.71 ppb
2022-03-08D300153993 3001539961.87 ppb
2022-03-08D300154252 3001542551.41 ppb
2022-03-08D300154257 3001542581.06 ppb
2022-03-08D300154260 3001542610.820 ppb
2022-03-09D300155008 3001550090.890 ppb
2022-03-10D300155239 300155242ND
2022-03-10D300155826 3001558281.06 ppb
2022-03-10D300155831 3001558331.61 ppb
2022-03-11D300156650 3001566510.840 ppb
2022-06-06D300193482 3001934854.10 ppb
2022-06-06D300193487 3001934894.36 ppb
2022-06-06D300193491 3001934934.25 ppb
2022-06-06D300193495 3001934972.59 ppb
2022-06-07D300194485 3001944872.46 ppb
2022-06-07D300194421 3001944243.27 ppb
2022-06-07D300194474 3001944772.97 ppb
2022-06-08D300194960 3001949623.57 ppb
2022-06-08D300196206 3001962083.70 ppb
2022-06-08D300196210 3001962124.60 ppb
2022-06-08D300196214 3001962164.50 ppb
2022-06-10D300196552 3001965543.58 ppb
2022-09-12D300242309 3002423113.44 ppb
2022-09-12D300242313 3002423152.50 ppb
2022-09-13D300242867 3002428702.52 ppb
2022-09-13D300242872 3002428752.91 ppb
2022-09-13D300243354 3002433572.63 ppb
2022-09-13D300243359 3002433613.20 ppb
2022-09-14D300243943 3002439453.03 ppb
2022-09-14D300243947 3002439492.09 ppb
2022-09-14D300243951 3002439531.85 ppb
2022-09-15D300244400 3002444021.28 ppb
2022-09-15D300244404 3002444061.81 ppb
2022-09-15D300245400 3002454024.26 ppb
2022-12-05D300280513 3002805154.34 ppb
2022-12-05D300280517 3002805195.50 ppb
2022-12-05D300280521 3002805232.26 ppb
2022-12-06D300281387 3002813902.82 ppb
2022-12-06D300281392 3002813944.15 ppb
2022-12-06D300281396 3002813981.56 ppb
2022-12-07D300282133 3002821364.86 ppb
2022-12-07D300282138 3002821415.03 ppb
2022-12-07D300282730 3002827325.92 ppb
2022-12-08D300283547 3002835493.43 ppb
2022-12-08D300283566 3002835683.58 ppb
2022-12-09D300284348 3002843503.86 ppb
2023-03-06D300316509 3003165112.01 ppb
2023-03-06D300316513 3003165152.94 ppb
2023-03-06D300316517 3003165191.07 ppb
2023-03-07D300317097 3003171002.13 ppb
2023-03-07D300317102 3003171052.51 ppb
2023-03-07D300317505 3003175081.59 ppb
2023-03-07D300317510 3003175122.48 ppb
2023-03-07D300317514 3003175160.990 ppb
2023-03-08D300318389 3003183911.000 ppb
2023-03-08D300318393 3003183951.07 ppb
2023-03-09D300319243 3003192451.99 ppb
2023-03-10D300319398 3003194001.70 ppb
2023-06-05D300358943 3003589454.64 ppb
2023-06-05D300358947 3003589494.78 ppb
2023-06-05D300358951 3003589533.91 ppb
2023-06-05D300358955 3003589572.71 ppb
2023-06-06D300358988 3003589913.19 ppb
2023-06-06D300358993 3003589964.05 ppb
2023-06-06D300359847 3003598504.21 ppb
2023-06-06D300359852 3003598542.40 ppb
2023-06-07D300360865 3003608674.09 ppb
2023-06-08D300361983 3003619854.18 ppb
2023-06-08D300361987 3003619895.09 ppb
2023-06-09D300362721 3003627232.67 ppb
2023-09-11D300412854 3004128568.37 ppb
2023-09-11D300412858 3004128606.88 ppb
2023-09-12D300413093 3004130966.23 ppb
2023-09-12D300413098 3004131014.87 ppb
2023-09-12D300413568 3004135714.83 ppb
2023-09-12D300413573 3004135757.03 ppb
2023-09-12D300413577 3004135795.06 ppb
2023-09-12D300413581 3004135833.88 ppb
2023-09-13D300414470 3004144725.34 ppb
2023-09-13D300414474 3004144766.32 ppb
2023-09-14D300415299 3004153016.12 ppb
2023-09-15D300416083 3004160856.66 ppb
2023-12-04D300454311 3004543132.28 ppb
2023-12-04D300454315 3004543172.93 ppb
2023-12-04D300454322 3004543241.53 ppb
2023-12-05D300454448 3004544511.87 ppb
2023-12-05D300454453 3004544562.89 ppb
2023-12-05D300454954 3004549572.10 ppb
2023-12-05D300454962 3004549641.97 ppb
2023-12-05D300454972 3004549742.01 ppb
2023-12-06D300455828 3004558301.06 ppb
2023-12-06D300455832 3004558341.40 ppb
2023-12-07D300456845 3004568472.24 ppb
2023-12-08D300457513 3004575152.84 ppb