Public Water System: Lake Oswego Municipal Water

MyTapWater.org's tap water quality report is the compilation of data collected from federal, state, and local government agencies, most prominently the EPA. We strive to populate the report with the latest data concerning water contaminants, lead and copper levels, and water quality violations. We only collect drinking water data from public water systems.

PWS Service Information
PWS ID: OR4100457
Type: Community water system
EPA Region: 10
Primary Service Area: Municipality
Primary Source: Surface water
Population Served: 36,093
Contact Information
DUNCAN, KARI
DUNCAN, KARI
PO BOX 369
LAKE OSWEGO, OR 97034

This public water system services 1 zip code in 1 municipality in 1 county.

Summary Results


A summary view of the the times a water contaminant was tested and found to exceed the level set by the EPA (the MCL).

We couldn't find any records of contaminants exceeding the regulated limits in your water.

Other Water Contaminants Tested


The following contaminants were tested and within national EPA guidelines.

The last mile of pipe makes a big difference, learn more about testing your water.

We couldn't find any records of contaminants in your water.

Lead and Copper Data


Lead and copper are recorded separately from other contaminants because of the Lead and Copper Rule. As with all other results, these are the findings at the water supply. Lead and copper can be — and often are — added to drinking water in between the water facility and a tap.

Sample ID Contaminant Sampling Start Date Sampling End Date Result
OR28456 lead 2015-01-01 2017-12-31 0.003mg/L
OR24981 lead 2014-01-01 2014-06-30 0.003mg/L
OR24831 lead 2013-07-01 2013-12-31 0.004mg/L
OR21961 lead 2011-01-01 2013-12-31 0mg/L
OR18964 lead 2008-01-01 2010-12-31 0.004mg/L

Violations


Known violations of the Safe Drinking Water Act as recorded by the EPA.

Compliance Dates Rule Violation Type Contaminant Name Status
2009-08-01 - 2009-08-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular 1,2,4-Trichlorobenzene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular cis-1,2-Dichloroethylene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Xylenes, Total Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular DICHLOROMETHANE Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular o-Dichlorobenzene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular p-Dichlorobenzene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Vinyl chloride Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular 1,1-Dichloroethylene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular trans-1,2-Dichloroethylene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular 1,2-Dichloroethane Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular 1,1,1-Trichloroethane Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Carbon tetrachloride Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular 1,2-Dichloropropane Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Trichloroethylene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular 1,1,2-Trichloroethane Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Tetrachloroethylene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular CHLOROBENZENE Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Benzene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Toluene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Ethylbenzene Returned to Compliance
2008-01-01 - 2008-12-31 Volatile Organic Chemicals Monitoring, Regular Styrene Returned to Compliance
2008-01-01 - 2008-12-31 Nitrates Monitoring, Regular Nitrate Returned to Compliance
2008-04-01 - 2008-06-30 Synthetic Organic Chemicals Monitoring, Regular 2,4-D Returned to Compliance
2008-01-01 - 2008-03-31 Synthetic Organic Chemicals Monitoring, Regular 2,4-D Returned to Compliance
2002-01-01 - 2002-12-31 Nitrates Monitoring, Regular Nitrate Returned to Compliance
1996-01-01 - 1996-01-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
1995-12-01 - 1995-12-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
1995-11-01 - 1995-11-30 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
1995-10-01 - 1995-10-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
1976-06-01 - 1980-05-31 Radionuclides Monitoring, Regular Gross Alpha, Excl. Radon and U Known
1976-06-01 - 1980-05-31 Radionuclides Monitoring, Regular Combined Radium (-226 and -228) Known
2000-01-01 - N/A Lead and Copper Rule OCCT/SOWT Treatment Installation/Demonstration Lead and Copper Rule Returned to Compliance

What My Water Data Means


Water data isn't always easy to interpret, but by following the links on this page you should be able to have most of your questions answered. By clicking the name of a water contaminant or secondary substance you can learn about that specific substance. Ultimately this page should give you some insight towards learning if your water is safe, what water filter you should buy (if any), and how well your local water compares against other sources.

Sources


The origin of MyTapWater.org's water data is explained on our Data Sources page.

Why Is My Water Data Not More Recent?


The recency of the data for your ZIP code depends on the last your water source was tested, by a federal, state, or local agency. More information about the timing can be determined by learning about the dataset in question and seeing how often the EPA (other another governing body) mandated testing.