RED RIVER OF THE NORTH BASIN 05083500 RED RIVER OF THE NORTH AT OSLO, MN-Continued WATER-QUALITY RECORDS PERIOD OF RECORD.--Water years 1973-77, 1986-96, 1998 to current year. WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 Date Time Instan- taneous dis- charge, cfs (00061) Tur- bidity, water, unfltrd field, NTU (61028) Baro- metric pres- sure, mm Hg (00025) Dis- solved oxygen, mg/L (00300) Dis- solved oxygen, percent of sat- uration (00301) pH, water, unfltrd field, std units (00400) pH, water, unfltrd lab, std units (00403) Specif. conduc- tance, wat unf lab, uS/cm 25 degC (90095) Specif. conduc- tance, wat unf uS/cm 25 degC (00095) Temper- ature, air, deg C (00020) Temper- ature, water, deg C (00010) Hard- ness, water, mg/L as CaCO3 (00900) APR 01... 1115 36,000 -- -- -- -- 7.5 7.5 445 434 11.5 2.0 170 MAY 12... 1010 3,590 450 729 10.0 91 8.3 7.9 675 665 2.0 9.0 250 WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 Date Calcium water, fltrd, mg/L (00915) Magnes- ium, water, fltrd, mg/L (00925) Potas- sium, water, fltrd, mg/L (00935) Sodium adsorp- tion ratio (00931) Sodium, water, fltrd, mg/L (00930) Sodium, percent (00932) ANC, wat unf fixed end pt, lab, mg/L as CaCO3 (90410) Chlor- ide, water, fltrd, mg/L (00940) Fluor- ide, water, fltrd, mg/L (00950) Silica, water, fltrd, mg/L (00955) Sulfate water, fltrd, mg/L (00945) Residue water, fltrd, sum of consti- tuents mg/L (70301) Residue water, fltrd, tons/d (70302) APR 01... 40.7 16.5 8.30 0.5 15.8 16 110 17.9 0.16 13.9 74.7 242 24,700 MAY 12... 57.5 26.8 5.60 0.9 34.1 22 171 31.2 -- -- 139 401 3,880 WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 Date Ammonia + org-N, water, fltrd, mg/L as N (00623) Ammonia + org-N, water, unfltrd mg/L as N (00625) Ammonia water, fltrd, mg/L as N (00608) Ammonia water, unfltrd mg/L as N (00610) Nitrite + nitrate water fltrd, mg/L as N (00631) Nitrite + nitrate water unfltrd mg/L as N (00630) Organic nitro- gen, water, fltrd, mg/L (00607) Organic nitro- gen, water, unfltrd mg/L (00605) Ortho- phos- phate, water, fltrd, mg/L as P (00671) Phos- phorus, water, fltrd, mg/L (00666) Phos- phorus, water, unfltrd mg/L (00665) Total nitro- gen, water, fltrd, mg/L (00602) Total nitro- gen, water, unfltrd mg/L (00600) APR 01... -- -- -- -- -- -- -- -- -- -- -- -- -- MAY 12... 0.89 0.67 0.306 0.264 0.595 0.570 0.58 0.41 0.107 0.108 0.682 1.5 1.2 WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 Date Fecal coli- form, M-FC 0.7u MF col/ 100 mL (31625) Chloro- phyll a phyto- plank- ton, fluoro, ug/L (70953) Chloro- phyll b phyto- plank- ton, fluoro, ug/L (70954) Arsenic water, fltrd, ug/L (01000) Iron, water, fltrd, ug/L (01046) Lead, water, fltrd, ug/L (01049) Lithium water, fltrd, ug/L (01130) Mangan- ese, water, fltrd, ug/L (01056) Mercury water, fltrd, ug/L (71890) Molyb- denum, water, fltrd, ug/L (01060) Selen- ium, water, fltrd, ug/L (01145) Stront- ium, water, fltrd, ug/L (01080) APR 01... -- -- -- 4.5 120 <1 20 80 <0.20 2 4 160 MAY 12... E83k <15.0 <5.0 -- 100 -- -- 40 -- -- -- -- Remark codes used in this table: < -- Less than E -- Estimated value Value qualifier codes used in this table: k -- Counts outside acceptable range
