Some toxicological studies on some environmental pollutant

80 water s amp Le s were collected from Benha ,:.’;huhra ,Iholl Zanb2l andMostord • These places represent the most important industrial ar e a sin Kalubia governorate rind the samples were subjected to some toxico- ,logical examination for evaluation of their hygienic corid i tionsical examinations~ The apparant colour :- 18 samples from the 80 examined samplesshowe4 a v ar-Lnb I e degree of y e l Low i ah colourtion •2- Tolal residunThe total residue of the examined snmples voried f~OM ~50 to 105nmg/L .and 9 s amp l.e s (11.25%) exceeded the max i.mu:n T’0rmissiblelimit (500-1500)mg/L)- Ho r-dn e s s r-anrre d from 96 to 186 mg/L n s ca. ,cll e x arn i n e d s8:T’C)leswere below the maximum uermissible level (500 mg/L)T- Organi c mei t ei: (as oxygen consumed) ranged from :;;.? fa ::>~. 5 mglT, •and 52 samples (65%) of exceeded the recommended limi t h:: ”TAterquality standards (1Omg/L)PH • value variect from 6.9 to 8.4 and all examined w8ter sampleswere sati sfied •