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
. . . .

REGION: 7

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

	PHYSICAL
and
BIOLOGICAL
	INORGANIC
mg/l	METALS
ug/l		

Stream Segment Description							

3.	Mainstem of the Arkansas River from a point immediately above the confluence with Wildhorse/Dry Creek Arroyo to a point immediately above the confluence with Fountain Creek, Valco Ponds and Fountain Lake.	
	
Aq Life Warm 1
Recreation E
Water Supply
Agriculture	
D.O. = 5.0 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/ch)=TVS
CrIII(ac)=TVS(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)=50.9
Se(ch)=17.4
Ag(ac)=TVS
Ag(ch)=TVS(tr)
Zn(ac/ch)=TVS	

REGION: 7

BASIN: FOUNTAIN CREEK 	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS	

	PHYSICAL
and
BIOLOGICAL
	INORGANIC
mg/l	METALS
ug/l		

Stream Segment Description							

2a.	Mainstem of Fountain Creek from a point immediately above the confluence with Monument Creek to a point immediately above the State Highway 47 Bridge.	
	
Aq Life Warm 2
Recreation E
Water Supply
Agriculture	
D.O. = 5.0 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=1.0
NO3=10
Cl=250
SO4=330	
As(ac)=340
As(ch)=0.02-10(Trec)
Cd(ac/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)=TVS
Se(ch)=8
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	
Temporary modifications:
NH3(ac/ch)=TVS (old).  Expiration date of 12/31/2013.

Type (iii):
Cu(ac/ch)=current condition,  Expiration date of 12/31/2013.	

4.	All tributaries to Fountain Creek which are not within the boundaries of National Forest or Air Force Academy lands, including all wetlands, lakes and reservoirs, from a point immediately above the confluence with Monument Creek to the confluence with the Arkansas River, expect for the specific listings in segments 5, 6 and 7a and 7b.	
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=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)	Temporary modification type (i):
NH3(ac/ch)=TVS (old).  Expiration date of 12/31/2013.

6.	Mainstem of Monument Creek, from the boundary of National Forest lands to the confluence with Fountain Creek.	
	
Aq Life Warm 2
Recreation E
Water Supply
Agriculture	
D.O. = 5.0 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 	
B=0.75
NO2=0.5
NO3=10
Cl=250
SO4=329	
As(ac)=340
As(ch)=0.02-10(Trec)
Cd(ac/ch)=TVS)
CrIII(ac)=50(Trec)
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	
Fe(ch)=WS(dis)
Fe(ch)=1430(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/ch)=TVS
Zn(ac/ch)=TVS	
Temporary modification:
type (iii):
Cu(ac/ch)=current condition,  Expiration date of 12/31/2013

REGION: 7

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

	PHYSICAL
and
BIOLOGICAL
	INORGANIC
mg/l	METALS
ug/l		

Stream Segment Description							

1b.	Mainstem of the Arkansas River from the Colorado Canal headgate to the inlet to John Martin Reservoir.	
UP	
Aq Life Warm 2
Recreation E
Water Supply
Agriculture	
D.O. = 5.0 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=0.5
NO3=10
Cl=250
SO4=902	
As(ac)=340
As(ch)=0.02(Trec)
Cd(ac/ch)=TVS
CrIII(ac)=50(Trec)
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	
Fe(ch)=WS(dis)
Fe(ch)= 1950(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/ch)=TVS
Zn(ac/ch)=TVS	
Temporary modification
type (iii):
Se(ch)=“current condition”
Expiration date of 12/31/2013

Water + Fish Standards Apply.	

7.	Mainstem of the Purgatoire River from Interstate 25 to the confluence with the Arkansas River.		
Aq Life Warm 1
Recreation E
Agriculture	
D.O.=5.0 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=0.5	
As(ac)=340
As(ch)=7.6(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	
Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(tot)
Ni(ac/ch)=TVS	
Se(ac/ch)=TVS
Ag(ac/ch)=TVS 
Zn(ac/ch)=TVS
	
  Temporary modification
type (iii):
Se(ch)=6.4,
Expiration date of 12/31/2013.

11.	John Martin Reservoir.	
	
Aq Life Warm 1
Recreation E
Water Supply
Agriculture	
D.O. = 5.0 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=0.5
 NO3=10
Cl=250
SO4=WS	
As(ac)=340
As(ch)=0.02(Trec)
Cd(ac/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(ch)=90(dis)
Mn(ac/ch)=TVS	
Hg(ch)=0.01(tot)
Ni(ac/ch)=TVS Se(ac/ch)=TVS Ag(ac/ch)=TVS
  Zn(ac/ch)=TVS	
Temporary modification type (iii):
Se(ch)=17
Expiration date of 12/31/2013.	

32.48	STATEMENT OF BASIS SPECIFIC STATUTORY AUTHORITY AND PURPOSE JUNE 13, 2011 RULEMAKING REGARDING TEMPORARY MODIFICATIONS; EFFECTIVE DATE JANUARY 1, 2012
The provisions of C.R S. 25-8-202(1)(a), (b) and (2); 25-8-203; 25-8-204; and 25-8-402; provide the specific statutory authority for adoption of these regulatory amendments.  The Commission also adopted in compliance with 24-4-103(4) C.R.S. the following statement of basis and purpose.
BASIS AND PURPOSE
The Commission’s decision to delay consideration of nutrient criteria until March 2012 resulted in cancelation of the December 2011 review of temporary modifications.  Accordingly, the Commission considered the expiration dates of temporary modifications expiring on or before December 31, 2012 in a written comment rulemaking.  The Commission extended the expiration dates of the following temporary modifications to December 31, 2013.  These will be reviewed again in a Temporary Modification hearing in December 2012.
Fountain Creek segment 2a (NH3, Cu)
Fountain Creek segment 4 (NH3)
Fountain Creek segment 6 (Cu)
The following temporary modifications were deleted from the table because they will have expired as of the effective date of this revision:
Middle Arkansas segment 3 (NH3)
Fountain Creek segment 6 (NH3)
Lower Arkansas segment 1b (NH3)
Lower Arkansas segment 7 (NH3)
The Commission corrected a typo in the expiration date of the selenium temporary modification in following segment: 
Lower Arkansas segment 11.