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| Introduction :: Data Search Options :: Water System Search :: DWS Home :: DWS Rules |
OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 00218 | ||
| PWS Name: | CORNELIUS, CITY OF | ||
| Who Was Contacted: | Rene Redelsperger | ||
| Contact Phone: | 503-702-6046 | ||
| Contact Date: | 11/08/2021 | ||
| Contacted By: | ALFAFARA, NICOLE (DWP) | ||
| Contact Method/Location: | Phone | ||
| Assistance Type: | WATER QUALITY ALERT RESPONSE | ||
| Reasons: | Disinfection Byproducts |
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| Details: | System Staff reached out to DWS Staff about recent DBP data. DWS Staff spoke with System Staff about the total trihalomethane (TTHM) sample result of 0.0809 mg/L for a DBP sample taken on 11/3/21 from #2 Reservoir site. System Staff suspected reservoir maintenance and cleaning that included drawing the reservoir down to ~4ft may have played a role in the high level of TTHM detected. DWS Staff informed System Staff DBP compliance is based on locational running annual average (LRAA) over 4 quarters and with the recent November results the TTHM LRAA is 0.053 mg/L for #2 Reservoir site which is below the TTHM LRAA MCL = 0.080 mg/L. | ||
| Associated Alerts: | CHEM9529 - 11/08/2021 - TTHM |
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