OHA Drinking Water Services
OR41
PWS ID: 00507 ---- MAPLETON WATER DISTRICT
LRAAs and OELs

LRAA = Locational running annual average; OEL = Operational evaluation level. Learn about OELs here.
Averages are subject to change as new data is taken into consideration.

TTHM MCL = 0.080 mg/L,  HAA5 MCL = 0.060 mg/L.  MCL exceedances are indicated with red text.

Monitoring
Period		 Last
Sample		 Sample
Point		 Location TTHM
LRAA		 TTHM
OEL		 HAA5
LRAA		 HAA5
OEL
4Q2021 Nov 05, 2021 2DBP-01 S1-1 10444 HWY 126 0.034 0.026 0.037 0.026
3Q2021 Jul 05, 2021 2DBP-01 S1-1 10444 HWY 126 0.039 0.035 0.047 0.042
2Q2021 Apr 19, 2021 2DBP-01 S1-1 10444 HWY 126 0.040 0.036 0.046 0.042
1Q2021 Jan 18, 2021 2DBP-01 S1-1 10444 HWY 126 0.042 0.050 0.049 0.057
4Q2020 Oct 08, 2020 2DBP-01 S1-1 10444 HWY 126 0.038 0.040 0.043 0.048
3Q2020 Jul 08, 2020 2DBP-01 S1-1 10444 HWY 126 0.044 0.035 0.043 0.037
2Q2020 Apr 15, 2020 2DBP-01 S1-1 10444 HWY 126 0.048 0.041 0.047 0.042
1Q2020 Jan 17, 2020 2DBP-01 S1-1 10444 HWY 126 0.051 0.051 0.045 0.050
4Q2019 Oct 16, 2019 2DBP-01 S1-1 10444 HWY 126 0.049 0.059 0.042 0.049
3Q2019 Jul 22, 2019 2DBP-01 S1-1 10444 HWY 126 0.039 0.044 0.035 0.040
2Q2019 Apr 02, 2019 2DBP-01 S1-1 10444 HWY 126 0.041 0.036 0.038 0.028
1Q2019 Jan 16, 2019 2DBP-01 S1-1 10444 HWY 126 0.040 0.038 0.041 0.039
4Q2018 Oct 08, 2018 2DBP-01 S1-1 10444 HWY 126 0.036 0.042 0.043 0.043
3Q2018 Jul 05, 2018 2DBP-01 S1-1 10444 HWY 126 0.046 0.042 0.045 0.050
2Q2018 Apr 11, 2018 2DBP-01 S1-1 10444 HWY 126 0.041 0.041 0.039 0.039
1Q2018 Jan 17, 2018 2DBP-01 S1-1 10444 HWY 126 0.044 0.034 0.041 0.039
4Q2017 Oct 11, 2017 2DBP-01 S1-1 10444 HWY 126 0.045 0.060 0.035 0.042
3Q2017 Jul 13, 2017 2DBP-01 S1-1 10444 HWY 126 0.049 0.038 0.037 0.035
2Q2017 Jun 08, 2017 2DBP-01 S1-1 10444 HWY 126 0.052 0.050 0.042 0.039
1Q2017 Jan 17, 2017 2DBP-01 S1-1 10444 HWY 126 0.048 0.044 0.038 0.034
4Q2016 Oct 10, 2016 2DBP-01 S1-1 10444 HWY 126 0.058 0.066 0.051 0.046
3Q2016 Jul 14, 2016 2DBP-01 S1-1 10444 HWY 126 0.055 0.050 0.048 0.053
2Q2016 Apr 20, 2016 2DBP-01 S1-1 10444 HWY 126 0.056 0.050 0.043 0.041
1Q2016 Jan 18, 2016 2DBP-01 S1-1 10444 HWY 126 0.063 0.063 0.049 0.052
4Q2015 Oct 28, 2015 2DBP-01 S1-1 10444 HWY 126 0.059 0.067 0.045 0.042
3Q2015 Jul 15, 2015 2DBP-01 S1-1 10444 HWY 126 0.059 0.055 0.042 0.046
2Q2015 Apr 07, 2015 2DBP-01 S1-1 10444 HWY 126 0.064 0.059 0.044 0.045
1Q2015 Mar 03, 2015 2DBP-01 S1-1 10444 HWY 126 0.062 0.060 0.045 0.044
4Q2014 Dec 04, 2014 2DBP-01 S1-1 10444 HWY 126 0.065 0.070 0.050 0.038
3Q2014 Sep 30, 2014 2DBP-01 S1-1 10444 HWY 126 0.065 0.066 0.050 0.056
2Q2014 Jun 10, 2014 2DBP-01 S1-1 10444 HWY 126 0.045 0.058 0.039 0.052
1Q2014 Mar 27, 2014 2DBP-01 S1-1 10444 HWY 126 0.033 0.025
4Q2013 Nov 26, 2013 2DBP-01 S1-1 10444 HWY 126 0.020 0.006



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