COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT 
WATER QUALITY CONTROL COMMISSION 
5 CCR 1002-32 
REGULATION NO. 32 
CLASSIFICATIONS AND NUMERIC STANDARDS 
FOR 
ARKANSAS RIVER BASIN
. . . .
STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 7

BASIN: LOWER ARKANSAS RIVER	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS	

	PHYSICAL
and
BIOLOGICAL	INORGANIC
mg/l	METALS
ug/l		

Stream Segment Description							

2a.	All tributaries to the Arkansas River, including wetlands, all lakes and reservoirs, from the Colorado Canal headgate to the Colorado/Kansas border except for specific listings in segments 2b, 2c, 3 through 13, and Middle Arkansas Basin listings.	
UP	
Aq Life Warm 2
Recreation N
Agriculture	
D.O. = 5.0 mg/l
pH = 6.5-9.0
E.Coli=630/100ml
	
CN=0.2
NO2=10
NO3=100
	
B=0.75
	
As(ch)=100(Trec)
Be(ch)=100(Trec)
Cd(ch)=10(Trec)
CrIII(ch)=100(Trec)
	
CrVI(ch)=100(Trec)
Cu(ch)=200(Trec)
Pb(ch)=100(Trec)
	
Ni(ch)=200(Trec)
Se(ch)=20(Trec)
Zn(ch)=2000(Trec)
	.	

2b.	King Arroyo.	
UP	
Aq Life Warm 2
Recreation E
Agriculture	
D.O. = 5.0 mg/l
pH = 6.5-9.0
E.Coli=126/100ml
	
CN=0.2
NO2=10
NO3=100
	
B=5.0
	
As(ch)=200(Trec)
Cd(ch)=50(Trec)
CrIII(ch)=1000(Trec)
	
CrVI(ch)=1000(Trec)
Cu(ch)=500(Trec)
Pb(ch)=100(Trec)
	
Hg(ch)=10.0(tot)
Se(ch)=50(Trec)
Zn(ch)=25000(Trec)
	
Livestock Watering Only.	

2c. 	Mainstem of Wildhorse Creek, including all tributaries, from a point immediately below US Highway 287 in Kit Carson to the confluence with Big Sandy Creek.
	
UP	
Aq Life Warm 2
Recreation N
Agriculture	
D.O. = 5.0 mg/l
pH = 6.5-9.0
E.Coli=630/100ml
	
CN=0.2
NO2=10
NO3=100
	
B=0.75
	
As(ch)=100(Trec)
Be(ch)=100(Trec)
Cd(ch)= 50(Trec)
CrIII(ch)=100(Trec)
	
CrVI(ch)=100(Trec)
Cu(ch)=200(Trec)
Pb(ch)=100(Trec)
	
Ni(ch)=200(Trec)
Se(ch)= 50(Trec)
Zn(ch)=2000(Trec)

3a.	Mainstem of the Apishapa River, including all wetlands, tributaries, lakes and reservoirs, from the source to I-25, except for specific listings in segments 3b and 3c.	
	
Aq Life Cold 1
Recreation E
Water Supply
Agriculture	
D.O. = 6.0 mg/l
D.O. (sp)=7.0 mg/l
pH = 6.5-9.0
E.Coli=126/100ml
	
NH3(ac/ch)=TVS
CL2(ac)=0.019
CL2(ch)=0.011
CN=0.005
S=0.002	
B=0.75
NO2=0.05
NO3=10
Cl=250
SO4=WS	
As(ac)=340
As(ch)=0.02(Trec)
Cd(ac)=TVS(tr)
Cd(ch)=TVS
CrIII(ac)=50(Trec)
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	
Fe(ch)=WS(dis)
Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Mn(ch)=WS(dis)	
Hg(ch)=0.01(tot)
Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac)=TVS
Ag(ch)=TVS(tr)
Zn(ac/ch)=TVS		

32.47	FINDINGS IN SUPPORT OF ADOPTION OF EMERGENCY REVISIONS TO REGULATION NO. 32, CLASSIFICATIONS AND NUMERIC STANDARDS FOR ARKANSAS RIVER BASIN  (5 CCR 1002-32), JUNE 13, 2011 HEARING, EFFECTIVE DATE JUNE 30, 2011 
Pursuant to sections 25-8-208 and 24-4-103(6), C.R.S., the Commission adopted revisions to Regulation No. 32, Classifications and Numeric Standards for Arkansas River Basin, on June 13, 2011.
The Town of Kit Carson proposed resegmentation of a portion of Wildhorse Creek in Lower Arkansas segment 2a and emergency adoption of revised standards for selenium and cadmium in order to be able to construct and operate new water and wastewater facilities, which are being financed through State Revolving Loan funds.  The purpose of constructing the new facilities is to resolve chronic noncompliance issues. 
 Wildhorse Creek is an ephemeral stream with no diversions in the lower portion to which Kit Carson discharges.  No crops, hay meadows, or other forage is irrigated within this portion of lower Wildhorse Creek.  Therefore, the current chronic selenium standard of 20ug/L (based on protecting forage crops) is more protective than necessary to support attainment of the designated uses for this stream reach.  Likewise, no beans, beets, turnips or lettuce (the crops sensitive to cadmium) are irrigated with water from this reach, so the cadmium standard is also more protective than necessary.  Therefore, the Commission has determined that resegmentation and emergency adoption of these selenium and cadmium standards is appropriate under these specific circumstances.
 The Commission is aware that if it does not take emergency action to adopt these immediate revisions to Regulation No. 32 Kit Carson’s funding commitments and approvals that were previously secured for planning, construction, and permitting of the new water and wastewater facilities may be rescinded, resulting in an unnecessary adverse impact on the public.  The Commission finds that these amount to exigent circumstances which warrant emergency adoption of these revisions to the relevant water quality standards pursuant to section 25-8-208.  The Commission further finds that these emergency revisions are imperatively necessary to preserve public health and welfare and that compliance with the procedural requirements of section 24-4-103, C.R.S., resulting in further delay, would be contrary to the public interest.
 The regulation is to be effective June 30, 2011, and continue in effect until the effective date of permanent regulations, or for one year, whichever comes first.