Water Quality Data - Cyanotoxins

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To meet Oregon Health Authority rules, the City of Salem monitors for the presence of Total Microcystin and Cylindrospermopsin (cyanotoxins).  Regulatory monitoring for cyanotoxins in North Santiam Watershed typically begins in April and ends in October (algae season).  Additional monitoring occurs November – April depending on the weather conditions and Detroit Reservoir water levels.

Note: Throughout the end of August and early September, tests of the source of Salem's drinking water showed very, very low amounts of toxins.  This is a good indication that the 2020 algae season is over.  As a result, and consistent with our annual cycle, we're sampling the water supply less frequently.  We are now doing routine monitoring and reporting on water samples from our intake at Geren Island once a week.

Samples are collected from multiple locations at Detroit Reservoir, Big Cliff Reservoir, the North Santiam River, and the two key locations listed below:

  • Aldersgate – This is where treated drinking water from the Geren Island Water Treatment Facility enters Salem's drinking water distribution system on its way to homes and businesses.
  • Intake – This is where raw, untreated water from the North Santiam River enters the Geren Island Water Treatment Facility.

Data from the Intake and from Aldersgate will be used to determine when to activate additional drinking water treatment processes at Geren Island, Thanks to an in-house ELISA testing system, the City is now able to provide Total Microcystin and Cylindrospermopsin test results faster.   When toxins are detected in the North Santiam River, samples will be collected daily and the results will be available the following day on the City website.

If the need arises to issue a water advisory, a City notification will be sent through the Salem Community Alert System (sign-up), posted on the front page of our website, shared with media, and posted to the City of Salem Facebook and Twitter social media accounts. The status on the City's drinking water and water advisory pages will also be updated to reflect that an advisory is in effect. 

​City of Salem ELISA Data

 

  
  
10/5/2020Intake ELISA Test Data through October 5, 2020
9/9/2020Intake Elisa Test Data through September 09, 2020
9/8/2020Intake ELISA Test Data through September 08, 2020
9/7/2020Intake ELISA Test Data through September 4, 2020
8/31/2020Intake ELISA Test Data through August 31, 2020
8/28/2020Intake ELISA Test Data through August 28, 2020
8/26/2020Intake ELISA Test Data through August 26, 2020
8/25/2020Intake ELISA Test Data through August 25, 2020
8/24/2020Intake ELISA Test Data through August 24, 2020
8/21/2020Intake ELISA test data through August 21, 2020
1 - 10Next
  
  
7/20/2020Aldersgate ELISA Test Data through July 20, 2020
7/14/2020Aldersgate ELISA Test Data through July 14, 2020
7/13/2020Aldersgate ELISA Test Data through July 13, 2020
7/6/2020Aldersgate ELISA Test Data through July 6, 2020
6/29/2020Aldersgate ELISA Test Data through June 29, 2020
6/22/2020Aldersgate ELISA Test Data through June 22, 2020
6/15/2020Aldersgate ELISA Test Data through June 15, 2020
6/9/2020Aldersgate ELISA Test Data through June 8, 2020
6/2/2020Aldersgate ELISA TEST Data through June 01, 2020
5/26/2020Aldersgate ELISA Test Data through May 25, 2020
1 - 10Next

Regulations on Cyantoxins

 

Algal Toxin

Health Advisory (Vulnerable Population)

Health Advisory
(All Population)

Health Advisory (Recreational Advisory)

Total Microcystins

0.3 µg/L

1.6 µg/L

4 µg/L

Cylindrospermopsin

0.7 µg/L

3 µg/L

8 µg/L

Health Advisory Level (HAL)

As defined by OAR 333-061-0520(8), health advisory level is a concentration of a cyanotoxin determined by the US Environmental Protection Agency, as specified in OAR 333-061-0530(1), at or below which adverse health effects are not expected to occur if consuming water containing cyanotoxins at this concentration for up to 10-days.

µg/L = micrograms per liter of water

DateTitle (with link to item)Type
10/5/2020Intake ELISA Test Data through October 5, 2020intake-elisa-test-data-through-2020-10-05.pdf
9/9/2020Intake Elisa Test Data through September 09, 2020intake-elisa-test-data-through-2020-09-21.pdf
9/8/2020Intake ELISA Test Data through September 08, 2020intake-elisa-test-data-through-2020-09-08.pdf
9/7/2020Intake ELISA Test Data through September 4, 2020Intake-elisa-test-data-through-2020-09-04.pdf
8/31/2020Intake ELISA Test Data through August 31, 2020Intake-elisa-test-data-through-2020-08-31.pdf
8/28/2020Intake ELISA Test Data through August 28, 2020intake-elisa-test-data-through-2020-08-28.pdf

Data for samples collected May 21–June 30, 2018

Data posted below includes results received July 3, 2018, from samples taken as late as June 30, 2018, and processed by an external lab. The data is cumulative from samples taken as early as May 21, 2018

DateTitle (with link to item)Type
7/3/2018Water Quality: Aldersgate test data updated July 3, 2018aldersgate-cyanotoxins-data-updated-2018-07-03.pdf
7/3/2018Water Quality: All site test data summary updated July 3, 2018water-quality-all-testing-site-summary-updated-2018-07-03.pdf
7/3/2018Water Quality: Countryside test data updated July 3, 2018countryside-cyanotoxins-data-updated-2018-07-03.pdf
7/3/2018Water Quality: Doral test data updated July 3, 2018doral-cyantoxins-data-updated-2018-07-03.pdf
7/3/2018Water Quality: Lake Vanessa test data updated July 3, 2018lake-vanessa-cyantoxins-data-updated-2018-07-03.pdf
7/3/2018Water Quality: Middle Intake test data updated July 3, 2018middle-intake-cyanotoxins-data-updated-2018-07-03.pdf
7/3/2018Water Quality: Nebraska test data updated July 3, 2018nebraska-cyanotoxins-data-updates-2018-07-03.pdf
7/1/2018Water Quality: Aldersgate test data updated July 1, 2018aldersgate-test-data-updated-2018-07-01.pdf
7/1/2018Water Quality: All site test data summary updated July 1, 2018all-site-test-data-summary-updated-2018-07-01.pdf
7/1/2018Water Quality: Countryside test data updated July 1, 2018countryside-test-data-updated-2018-07-01.pdf
7/1/2018Water Quality: Doral test data update July 1, 2018doral-test-data-updated-2018-07-01.pdf
7/1/2018Water Quality: Lake Vanessa test data updated July 1, 2018lake-vanessa-test-data-updated-2018-07-01.pdf
7/1/2018Water Quality: Middle Intake test data updated July 1, 2018middle-intake-test-data-updated-2018-07-01.pdf
7/1/2018Water Quality: Nebraska test data updated July 1, 2018nebraska-test-data-updated-2018-07-01.pdf
6/29/2018Water Quality: Aldersgate test data updated June 29, 2018aldersgate-cyanotoxins-data-updated-2018-06-29.pdf
6/29/2018Water Quality: All site test data summary updated June 29, 2018water-quality-all-testing-site-summary-updated-2018-06-29.pdf
6/29/2018Water Quality: Countryside test data update June 29, 2018countryside-cyanotoxins-data-updated-2018-06-29.pdf
6/29/2018Water Quality: Doral test data updated June 29, 2018doral-cyantoxins-data-updated-2018-06-29.pdf
6/29/2018Water Quality: Lake Vanessa test data updated June 29, 2018lake-vanessa-cyantoxins-data-updated-2018-06-29.pdf
6/29/2018Water Quality: Middle Intake test data updated June 29, 2018middle-intake-cyanotoxins-data-updated-2018-06-29.pdf
6/29/2018Water Quality: Nebraska test data updated June 29, 2018nebraska-cyanotoxins-data-updates-2018-06-29.pdf

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