Environmental risk assessment of Macabalan creek water in Cagayan de Oro, Philippines
Creek water carries both domestic and commercial wastewater consequently draining organic and inorganic pollutants to coastal water. The present study dealt on the environmental risk assessment of creek water stretching in Macabalan-Cagayan de Oro, Philippines. Selected physicochemical analyses of water samples were carried in both temporal and spatial variations. Risk quotient (RQ), water quality index (WQI), and brine shrimp lethality test (BSL) was employed to draw environmental risk estimate. Overall, dissolved oxygen (DO) concentrations were below the standard set regardless of temporal and spatial variations. Both RQ and WQI showed good statuses on creek water quality despite the low DO. The BSLT similarly indicated a higher concentration for LC50 to be established. The study was preliminary and further monitoring may be essential.
Creek water carries both domestic and commercial wastewater consequently draining organic and inorganic pollutants to coastal water. The present study dealt on the environmental risk assessment of creek water stretching in Macabalan-Cagayan de Oro, Philippines. Selected physicochemical analyses of water samples were carried in both temporal and spatial variations. Risk quotient (RQ), water quality index (WQI), and brine shrimp lethality test (BSL) was employed to draw environmental risk estimate. Overall, dissolved oxygen (DO) concentrations were below the standard set regardless of temporal and spatial variations. Both RQ and WQI showed good statuses on creek water quality despite the low DO. The BSLT similarly indicated a higher concentration for LC50 to be established. The study was preliminary and further monitoring may be essential.
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J. Bio. & Env. Sci. 2017<br />
Spatial and temporal variations <strong>of</strong> <strong>water</strong> quality<br />
parameters<br />
The result <strong>of</strong> the statistical analyses is summarized <strong>in</strong><br />
Table 8. The pH, temperature, conductivity, sal<strong>in</strong>ity,<br />
TDS, and alkal<strong>in</strong>ity showed statistical difference (p<br />
site 1<br />
(46.28) > site 2 (45.23). Despite the mo<strong>de</strong>rately<br />
acceptable WQI the current situation <strong>in</strong> <strong>Macabalan</strong><br />
<strong>creek</strong> can be aggravated ow<strong>in</strong>g to proliferation <strong>of</strong><br />
adjacent establishments (with<strong>in</strong> the 20 m buffer zone).<br />
In return the effluent run<strong>of</strong>f from the resi<strong>de</strong>ntial area,<br />
salt factory, and other establishments may<br />
consequently alter the <strong>water</strong> quality.<br />
316 | Bansilay et al.
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