ARKANSAS RIVER BASIN

07099400 ARKANSAS RIVER ABOVE PUEBLO, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1965 to September 1970, December 1985 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07099400

PERIOD OF DAILY RECORD.--

SPECIFIC CONDUCTANCE: December 1985 to current year.

WATER TEMPERATURE: December 1985 to current year.

INSTRUMENTATION.--Water-quality monitor with satellite telemetry.

REMARKS.--Daily specific-conductance records are good except for Oct. 1, 12, 15-16, 23, Jan. 16, Apr. 27, 29, and May 8, which are fair. Daily water-temperature records are good except for Oct. 1, 12-23, and Nov. 16 to Jan. 16, which are fair. Daily data that are not published are either missing or of unacceptable quality. Specific conductance data may not be representative of the river at the site during periods of transient hydrologic conditions caused by abrupt flow changes from Pueblo Reservoir.

EXTREMES FOR PERIOD OF DAILY RECORD.--

SPECIFIC CONDUCTANCE: Maximum, 1,670 microsiemens/cm, Sept. 30, 2002; minimum, 223 microsiemens/cm, July 13, 1986.

WATER TEMPERATURE: Maximum, 26.9°C, Aug. 31, Sept. 5, 2002; minimum, 0.8°C, Dec. 26, 2003.

EXTREMES FOR CURRENT YEAR.--

SPECIFIC CONDUCTANCE: Maximum recorded, 808 microsiemens/cm, Nov. 16, but was probably higher during periods of unreliable record, Oct. 1, 12-30, and Nov. 17 to Jan. 16; minimum, 315 microsiemens/cm, June 22.

WATER TEMPERATURE: Maximum, 23.4°C, Aug. 17; minimum, 0.8°C, Dec. 26.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Dis- solved oxygen, mg/L (00300)	pH, water, unfltrd field, std units (00400)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)	Ammonia water, fltrd, mg/L as N (00608)	Nitrite + nitrate water fltrd, mg/L as N (00631)	Nitrite water, fltrd, mg/L as N (00613)	Ortho- phos- phate, water, fltrd, mg/L as P (00671)	Phos- phorus, water, fltrd, mg/L (00666)	Phos- phorus, water, unfltrd mg/L (00665)	Organic carbon, water, fltrd, mg/L (00681)
APR
23...	1315	225	10.3	8.4	643	10.0	0.048	0.223	0.007	<0.007	0.005	0.015	2.1
JUN
18...	1300	1,590	9.0	8.0	355	17.5	E.011	0.362	0.017	E.006	0.011	0.065	2.2
JUL
31...	1215	237	8.5	8.1	342	22.0	0.065	0.182	0.005	0.008	0.014	0.034	2.3
AUG
26...	0915	191	7.8	8.3	366	22.5	0.072	0.089	E.002	E.004	0.009	0.031	2.3
SEP
29...	1000	40	9.7	8.4	419	17.5	E.011	0.107	0.008	E.004	0.006	0.021	2.2
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

WATER-QUALITY DATA COLLECTED AS PART OF PREFERRED STORAGE OPTIONS PLAN,

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Dis- solved oxygen, mg/L (00300)	pH, water, unfltrd field, std units (00400)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)	Calcium water, fltrd, mg/L (00915)	Magnes- ium, water, fltrd, mg/L (00925)	Potas- sium, water, fltrd, mg/L (00935)	Sodium, water, fltrd, mg/L (00930)	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)
DEC
17...	1030	0.72	9.3	8.1	822	4.5	95.7	28.0	3.54	44.0	E177	11.7	0.81
MAR
10...	1210	27	12.0	8.5	653	6.0	70.3	22.8	3.08	36.0	138	10.9	0.63
MAY
28...	0745	2,020	8.9	8.3	660	14.5	65.1	20.8	3.17	34.1	137	13.4	0.6
AUG
26...	0915	191	7.8	8.3	366	22.5	43.1	10.4	2.17	15.8	95	5.91	0.5

WATER-QUALITY DATA COLLECTED AS PART OF PREFERRED STORAGE OPTIONS PLAN,

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Sulfate water, fltrd, mg/L (00945)
DEC
17...	248
MAR
10...	182
MAY
28...	182
AUG
26...	77.8
E -- Estimated laboratory analysis value.

Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius 

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

DAY	MAX	MIN	MEAN	MAX	MIN	MEAN	MAX	MIN	MEAN	MAX	MIN	MEAN
	OCTOBER			NOVEMBER			DECEMBER			JANUARY
1	---	697	---	681	665	673	---	---	---	---	---	---
2	700	675	688	683	666	675	---	---	---	---	---	---
3	682	662	672	679	659	672	---	---	---	---	---	---
4	669	661	666	675	659	668	---	---	---	---	---	---
5	670	664	668	673	658	667	---	---	---	---	---	---
6	671	665	668	674	657	668	---	---	---	---	---	---
7	671	664	668	673	651	666	---	---	---	---	---	---
8	687	663	671	674	657	668	---	---	---	---	---	---
9	750	670	698	673	651	666	---	---	---	---	---	---
10	732	680	702	673	656	668	---	---	---	---	---	---
11	778	683	713	673	652	667	---	---	---	---	---	---
12	---	705	---	673	655	667	---	---	---	---	---	---
13	---	---	---	673	660	668	---	---	---	---	---	---
14	---	---	---	680	661	674	---	---	---	---	---	---
15	---	718	---	715	679	692	---	---	---	---	---	---
16	---	684	---	808	715	754	---	---	---	---	680	---
17	---	---	---	---	---	---	---	---	---	687	669	678
18	---	---	---	---	---	---	---	---	---	688	673	680
19	---	---	---	---	---	---	---	---	---	694	679	685
20	---	---	---	---	---	---	---	---	---	712	683	690
21	---	---	---	---	---	---	---	---	---	690	675	681
22	---	---	---	---	---	---	---	---	---	682	676	679
23	---	709	---	---	---	---	---	---	---	686	670	680
24	---	---	---	---	---	---	---	---	---	688	673	679
25	---	---	---	---	---	---	---	---	---	690	673	680
26	---	---	---	---	---	---	---	---	---	686	672	681
27	---	---	---	---	---	---	---	---	---	703	679	686
28	---	---	---	---	---	---	---	---	---	692	676	684
29	---	---	---	---	---	---	---	---	---	690	671	681
30	---	---	---	---	---	---	---	---	---	696	672	680
31	680	672	676	---	---	---	---	---	---	692	673	681
MONTH	---	---	---	---	---	---	---	---	---	---	---	---
	FEBRUARY			MARCH			APRIL			MAY
1	685	673	680	684	665	677	661	644	655	659	649	654
2	696	675	684	683	673	678	662	642	647	658	652	655
3	688	670	679	710	668	677	648	644	646	657	653	655
4	689	670	677	679	669	675	647	644	645	660	652	656
5	685	672	678	677	666	674	646	643	645	660	653	657
6	683	672	678	683	667	675	646	643	645	659	654	656
7	682	670	675	683	665	673	648	644	646	660	654	657
8	678	667	674	680	667	674	660	644	648	748	439	691
9	678	668	674	681	666	675	649	645	647	729	662	700
10	701	672	678	678	666	674	651	646	649	681	667	675
11	674	665	671	681	664	674	654	647	650	687	674	679
12	679	665	671	687	667	676	653	647	650	687	675	681
13	675	666	671	690	665	676	652	648	650	686	654	666
14	680	669	675	682	666	674	654	648	651	660	656	658
15	679	666	673	681	668	675	654	646	650	661	657	659
16	678	670	674	679	670	674	652	642	647	662	656	659
17	696	670	677	684	669	676	653	647	650	660	656	658
18	677	667	672	682	645	660	654	646	651	660	656	659
19	677	668	673	652	640	645	652	642	648	661	656	659
20	676	665	672	646	638	642	652	646	649	662	659	661
21	676	666	672	646	639	642	652	646	649	663	658	660
22	681	666	673	652	641	646	652	647	649	663	659	661
23	683	668	676	661	646	653	656	646	650	665	660	662
24	680	664	672	667	653	661	651	645	648	665	661	663
25	676	665	672	663	647	656	657	645	649	666	661	664
26	676	665	672	664	648	655	655	650	653	667	665	666
27	680	665	674	659	644	648	655	648	652	668	662	666
28	681	668	677	652	644	649	---	---	---	672	661	666
29	---	---	---	651	646	649	657	651	655	665	661	664
30	---	---	---	662	646	656	657	648	652	670	658	665
31	---	---	---	662	654	658	---	---	---	667	599	655
MONTH	701	664	675	710	638	664	---	---	---	748	439	664
	JUNE			JULY			AUGUST			SEPTEMBER
1	636	563	601	328	322	325	360	356	358	396	389	392
2	633	407	513	333	320	325	362	358	359	417	394	403
3	488	412	448	332	319	326	364	359	362	436	402	418
4	468	381	430	331	322	326	369	357	361	431	410	420
5	471	417	444	330	323	327	361	357	359	421	413	418
6	447	391	424	331	326	328	361	357	360	419	408	414
7	444	343	413	331	325	328	363	359	361	419	412	415
8	441	398	425	331	327	329	381	362	370	419	398	408
9	456	396	413	330	325	327	370	364	368	404	399	402
10	467	386	416	330	327	329	370	365	368	408	403	405
11	425	381	400	336	328	331	369	364	367	404	400	402
12	404	364	387	335	330	333	369	364	367	406	401	404
13	405	372	388	335	331	333	369	365	367	410	406	408
14	390	380	385	334	331	333	370	363	367	411	409	410
15	386	366	376	335	331	333	371	364	367	414	410	411
16	377	362	370	336	332	334	371	366	369	416	410	414
17	377	358	368	338	333	336	373	367	370	419	414	417
18	372	354	360	340	336	338	374	368	371	427	415	422
19	359	330	350	342	337	340	376	370	373	427	419	423
20	350	330	342	345	339	342	377	370	374	422	414	419
21	347	329	334	346	340	343	377	372	375	421	416	419
22	333	315	326	348	342	345	380	375	377	427	419	422
23	336	322	328	349	344	347	381	376	378	427	423	425
24	337	321	327	353	345	349	381	376	379	433	423	428
25	345	316	327	356	349	352	380	376	378	433	426	430
26	331	321	325	358	351	355	381	376	379	452	430	446
27	329	322	326	359	353	356	382	378	380	455	444	450
28	333	318	326	360	354	357	383	378	381	461	447	453
29	332	316	324	360	349	354	386	380	382	461	444	453
30	330	323	326	356	352	354	386	379	383	462	446	453
31	---	---	---	359	354	356	392	385	388	---	---	---
MONTH	636	315	384	360	319	338	392	356	371	462	389	420

Temperature, water, degrees Celsius 

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

DAY	MAX	MIN	MEAN	MAX	MIN	MEAN	MAX	MIN	MEAN	MAX	MIN	MEAN
	OCTOBER			NOVEMBER			DECEMBER			JANUARY
1	17.9	13.4	16.0	11.1	10.9	11.0	9.0	2.8	6.0	6.5	3.5	4.8
2	17.3	16.3	16.8	11.3	10.6	10.9	9.3	4.0	6.5	6.6	2.6	4.7
3	18.1	16.7	17.2	11.0	9.8	10.3	6.3	2.9	4.6	8.2	3.0	5.5
4	17.9	16.7	17.1	10.4	9.6	9.8	5.6	3.0	4.6	6.9	4.5	5.9
5	17.7	16.4	16.8	10.8	9.5	9.9	6.6	4.8	5.5	6.1	3.7	5.1
6	17.5	16.3	16.7	10.7	9.6	10	7.4	2.7	5.1	9.3	5.5	7.0
7	17.4	16.2	16.6	10.6	9.5	9.8	7.8	3.2	5.4	8.7	3.8	6.4
8	17.3	16.1	16.4	10.4	9.6	9.8	7.7	4.1	5.6	9.1	4.5	6.5
9	18.2	15.8	16.6	10.5	9.4	9.8	7.0	2.3	4.6	7.3	3.5	5.5
10	18.2	15.4	16.3	10.0	9.0	9.3	7.2	2.5	4.8	6.1	2.4	4.3
11	18.6	14.9	16.3	9.9	8.8	9.2	7.8	2.9	5.4	4.1	3.0	3.5
12	17.9	13.4	15.5	9.6	8.6	9.0	7.7	3.4	5.7	7.9	3.2	5.2
13	18.3	10.5	14.1	9.6	8.9	9.1	8.2	3.2	5.5	8.8	3.0	5.8
14	17.4	10.7	13.9	9.3	8.6	9.0	8.3	3.1	5.7	7.2	3.8	5.5
15	17.0	9.6	13.1	10.2	6.5	8.2	6.6	4.4	5.6	7.8	2.8	5.3
16	17.1	---	---	10.3	3.3	6.4	7.6	2.3	5.4	6.0	2.4	3.7
17	17.1	9.6	13.3	11.0	5.7	7.9	8.2	4.1	5.8	4.9	2.1	3.0
18	17.7	10.2	13.5	11.2	5.9	8.1	6.4	3.7	4.9	4.6	1.7	2.7
19	16.7	10.5	13.2	11.0	4.5	7.2	7.1	3.6	5.0	5.2	1.8	3.1
20	17.4	10.1	13.2	11.0	5.1	7.7	6.6	2.1	4.2	5.6	2.4	3.5
21	---	10.7	12.6	11.9	4.8	8.1	6.3	2.9	4.2	4.8	2.3	3.1
22	14.7	10.3	12.2	11.3	5.1	8.2	5.9	2.1	4.1	2.6	1.9	2.2
23	12.0	8.1	10.6	11.7	4.9	8.2	4.2	2.5	3.4	4.7	1.9	2.6
24	11.6	11.6	11.6	6.8	4.3	5.5	4.4	1.8	2.8	4.5	2.0	2.9
25	---	---	---	6.0	3.4	4.4	4.3	0.9	2.4	5.0	2.1	3.1
26	---	---	---	5.5	1.9	3.6	4.2	0.8	2.3	5.4	1.8	3.2
27	---	---	---	6.1	1.6	3.8	4.4	1.1	2.6	5.6	2.6	3.7
28	---	---	---	7.6	2.7	5.0	5.2	1.9	3.5	5.8	2.5	3.5
29	---	---	---	10.0	4.5	6.8	7.4	3.5	4.9	5.6	2.5	3.5
30	---	---	---	8.7	4.1	6.1	7.6	3.2	5.0	4.4	2.3	3.2
31	11.5	11.0	11.3	---	---	---	6.2	2.3	4.3	5.4	2.8	3.7
MONTH	---	---	---	11.9	1.6	8.1	9.3	0.8	4.7	9.3	1.7	4.2
	FEBRUARY			MARCH			APRIL			MAY
1	5.6	2.9	3.8	6.0	2.6	3.5	8.6	6.2	7.0	11.1	10.1	10.4
2	5.0	2.8	3.6	6.0	2.6	3.6	8.6	7.0	7.6	11.4	10.1	10.5
3	5.6	2.5	3.5	5.9	2.2	3.7	8.4	7.3	7.7	12.3	10.2	10.9
4	5.4	2.2	3.3	3.4	2.2	2.9	7.8	7.1	7.4	11.9	10.5	11.2
5	5.2	2.3	3.3	5.8	2.2	3.3	7.7	7.0	7.2	12.0	10.8	11.3
6	3.8	1.8	2.5	6.2	2.4	3.8	7.7	7.0	7.2	11.9	10.8	11.2
7	4.6	1.3	2.3	6.8	2.7	4.1	7.7	7.0	7.2	12.1	10.9	11.5
8	4.6	1.0	2.1	7.0	3.1	4.5	8.6	7.0	7.6	14.8	11.0	12.6
9	3.3	1.1	1.9	7.2	3.1	4.6	8.7	6.9	7.6	15.4	10.5	12.0
10	4.5	1.1	2.2	7.3	3.4	4.8	9.1	7.1	7.9	13.3	11.1	12.0
11	4.3	1.4	2.4	7.6	3.5	5.2	8.9	7.1	7.7	13.6	11.1	12.1
12	5.3	1.8	3.1	8.1	4.2	5.5	8.1	7.2	7.5	14.1	11.3	12.4
13	4.3	2.6	3.2	8.4	4.2	5.8	8.2	7.2	7.6	13.1	11.4	12.3
14	4.9	2.7	3.4	8.4	4.4	5.9	8.1	7.2	7.5	13.1	12.1	12.5
15	3.5	2.5	2.9	8.7	4.7	6.1	9.2	7.3	7.8	13.0	12.0	12.5
16	3.7	2.4	2.8	7.2	4.5	5.6	11.1	8.5	9.5	13.2	12.5	12.7
17	5.5	2.4	3.5	5.6	4.8	5.1	9.5	8.5	8.8	13.2	12.5	12.7
18	3.7	2.7	3.1	5.6	4.7	5.1	10.5	8.3	9.3	13.3	12.5	12.8
19	4.9	2.3	3.1	5.4	5.0	5.3	9.5	8.9	9.2	13.0	12.4	12.7
20	4.5	2.0	2.9	6.4	5.2	5.7	10.1	9.1	9.4	13.7	12.8	13.1
21	5.6	2.1	3.2	5.8	5.3	5.6	10.1	9.1	9.4	13.3	12.8	13.0
22	5.6	2.2	3.3	6.3	5.3	5.6	10.2	9.1	9.6	14.0	12.9	13.4
23	4.9	1.8	2.9	6.3	5.2	5.6	10.1	9.0	9.6	14.0	12.9	13.5
24	4.5	1.5	2.3	6.2	5.3	5.6	10.7	9.6	10.0	14.4	12.7	13.7
25	4.7	1.7	2.7	6.6	5.3	5.7	10.8	9.8	10.1	14.2	13.0	13.7
26	4.0	2.2	2.9	6.4	5.1	5.6	11.0	9.7	10.2	14.4	13.5	14.0
27	5.6	2.3	3.4	7.7	5.6	6.5	---	9.8	---	14.4	13.9	14.2
28	4.5	2.2	3.1	7.3	6.0	6.5	---	---	---	14.8	14.0	14.4
29	---	---	---	7.2	5.8	6.2	11.3	9.9	10.7	15.2	13.8	14.6
30	---	---	---	8.0	5.7	6.4	11.1	9.9	10.3	15.4	14.2	14.9
31	---	---	---	8.2	5.8	6.7	---	---	---	15.8	14.5	15.2
MONTH	5.6	1.0	3.0	8.7	2.2	5.2	---	---	---	15.8	10.1	12.7
	JUNE			JULY			AUGUST			SEPTEMBER
1	18.1	15.4	16.2	18.8	17.9	18.3	22.1	20.8	21.4	22.7	21.8	22.1
2	16.5	15.5	16.1	19.0	17.8	18.4	22.1	21.3	21.7	22.7	21.5	22.0
3	16.6	15.9	16.2	19.3	17.7	18.4	22.3	21.4	21.8	22.2	21.2	21.5
4	16.9	15.6	16.4	19.3	17.9	18.5	22.3	21.5	22.0	22.5	20.9	21.5
5	17.2	16.0	16.7	18.9	18.0	18.6	22.5	21.7	22.0	22.6	21.0	21.5
6	16.7	15.2	16.2	19.1	18.2	18.5	22.6	21.7	22.1	22.3	21.2	21.5
7	16.5	15.2	16.1	19.2	18.2	18.7	22.5	21.8	22.1	21.9	21.2	21.4
8	16.3	15.5	16.0	19.4	18.4	18.8	22.9	21.3	22.0	22.3	21.1	21.5
9	16.3	15.5	15.9	19.4	18.3	18.9	22.8	21.3	21.9	21.7	21.1	21.3
10	16.3	15.5	15.9	19.5	18.7	19.1	22.8	21.3	21.9	21.8	20.9	21.3
11	16.9	15.3	16.2	19.8	18.5	19.0	22.8	21.6	22.0	21.6	20.7	21.0
12	17.1	15.5	16.6	19.7	18.7	19.1	22.7	21.5	22.0	21.3	20.4	20.8
13	17.0	16.4	16.7	19.7	18.8	19.2	23.0	21.6	22.1	20.4	19.7	20.0
14	17.1	16.5	16.8	19.8	19.0	19.4	23.1	21.5	22.1	20.3	19.5	19.8
15	17.2	16.7	16.9	20.0	19.2	19.6	22.9	21.6	22.1	19.9	19.0	19.5
16	18.1	16.6	17.1	20.1	19.2	19.7	23.1	21.6	22.2	19.7	18.9	19.2
17	17.9	16.7	17.2	20.2	19.4	19.8	23.4	21.8	22.3	19.3	18.0	18.9
18	17.5	16.9	17.2	20.1	19.5	19.8	22.8	21.8	22.2	19.4	18.0	18.7
19	17.7	16.7	17.2	20.8	19.4	20.0	23.1	21.7	22.3	19.5	17.9	18.5
20	17.6	16.8	17.3	20.3	19.7	20.0	23.0	22.0	22.4	19.0	17.8	18.3
21	17.5	16.9	17.2	20.8	19.5	20.0	23.0	21.9	22.3	18.9	17.6	18.1
22	17.8	17.0	17.4	20.5	19.7	20.1	23.1	21.8	22.3	18.7	17.2	17.9
23	17.8	16.9	17.5	20.9	19.9	20.3	23.1	21.9	22.4	18.9	17.4	17.9
24	17.9	16.9	17.4	21.0	19.6	20.3	23.3	22.1	22.6	19.0	17.3	17.9
25	18.2	16.6	17.5	21.1	19.9	20.4	23.2	22.2	22.5	19.6	16.9	17.9
26	18.3	17.2	17.7	21.1	19.9	20.5	23.2	22.3	22.5	20.0	16.7	17.9
27	18.6	17.4	17.9	21.0	20.0	20.5	23.2	22.1	22.5	19.9	16.6	17.8
28	18.5	17.3	17.9	21.1	20.3	20.6	22.8	22.3	22.5	19.6	16.1	17.4
29	18.5	17.3	18.0	22.1	20.4	20.9	23.1	22.1	22.5	19.7	16.2	17.5
30	18.9	17.8	18.2	21.7	20.6	21.2	22.9	22.2	22.4	19.2	16.4	17.3
31	---	---	---	22.0	20.8	21.2	22.5	22.0	22.2	---	---	---
MONTH	18.9	15.2	16.9	22.1	17.7	19.6	23.4	20.8	22.2	22.7	16.1	19.6