Contamination and ecological risk assessment of toxic metals in Awetu watershed stream waters and sediments, Ethiopia.

The study analyzed the contamination level and ecological risk assessment of toxic metals Awetu watershed streams. A total of 20 water and 20 sediment samples were collected and analyzed for the toxic metals of Arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), tin (Sn), and zinc (Zn). Sediment samples showed severe contamination levels based on ranges in sediment quality guidelines (SQGs).

Correction: Exposure to organochlorine pesticides as a predictor to breast cancer: A case-control study among Ethiopian women.

[This corrects the article DOI: 10.1371/journal.pone.

Exposure to organochlorine pesticides as a predictor to breast cancer: A case-control study among Ethiopian women.

Breast cancer (BC) is becoming one of the most prevalent non-infectious disease in low and middle income countries. The steady rise of BC incidence may be related to the different risk factors. Among many, rampant presence of environmental pollutants might be one of the risk factors.

Corrigendum to "Organochlorine pesticide residues in tea and their potential risks to consumers in Ethiopia" [Heliyon 7 (7) (July 2021) e07667].

[This corrects the article DOI: 10.1016/j.heliyon.

Sources and level of heavy metal contamination in the water of Awetu watershed streams, southwestern Ethiopia.

The present study aimed to investigate the contamination source, level, and spatial distribution of globally alarming trace metals from Awetu watershed streams, southwestern Ethiopia. Surface water samples were collected from 20 sampling sites in December 2019. Water samples were collected in 500 ml polyethylene bottles previously washed with deionized water and rinsed with the sample to be collected from different stretches and acidified with 5 ml concentrated nitric acid.