OHA Drinking Water Services
OR41
PWS ID: 95623 ---- CHEHALEM RIDGE NATURE PARK
Arsenic Running Annual Averages

Results shown are only for quarterly or monthly monitoring schedules.
Averages are subject to change as new data is taken into consideration.

Arsenic MCL = 0.010 mg/L. MCL exceedances are indicated with red text.

MP Begin MP End MP Name Location Sample
Point		 Arsenic RAA
(mg/L)
10/01/2021 12/31/2021 4Q2021 EP FOR WELL EP-A0.000
07/01/2021 09/30/2021 3Q2021 EP FOR WELL EP-A0.000
04/01/2021 06/30/2021 2Q2021 EP FOR WELL EP-A0.000