OHA Drinking Water Services
OR41
PWS ID: 00203 ---- COLUMBIA CITY MUN WATERWORKS
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
4Q2014 Nov 19, 2014 2DBP-01 61061 COL R. HWY (CHIMES CREST) (TTHM) 0.005 0.005
4Q2014 Nov 19, 2014 2DBP-02 1510 6TH ST. (HAA5) 0.001 0.001
3Q2014 Aug 13, 2014 2DBP-01 61061 COL R. HWY (CHIMES CREST) (TTHM) 0.005 0.005
3Q2014 Aug 13, 2014 2DBP-02 1510 6TH ST. (HAA5) 0.001 0
2Q2014 May 21, 2014 2DBP-01 61061 COL R. HWY (CHIMES CREST) (TTHM) 0.004 0.007
2Q2014 May 21, 2014 2DBP-02 1510 6TH ST. (HAA5) 0.001 0.001
1Q2014 Feb 12, 2014 2DBP-01 61061 COL R. HWY (CHIMES CREST) (TTHM) 0.002
1Q2014 Feb 12, 2014 2DBP-02 1510 6TH ST. (HAA5) 0.001
4Q2013 Nov 13, 2013 2DBP-01 61061 COL R. HWY (CHIMES CREST) (TTHM) 0.001
4Q2013 Nov 13, 2013 2DBP-02 1510 6TH ST. (HAA5) 0