BASIN Home
BASIN Text Image
Current Theme: Watershed

Colorado Department of Health Water Quality Control Commission Stream Classifications and Water Quality Standards for the Boulder Creek Watershed
REGION: 2 and 3 Desig. Classifications       NUMERIC STANDARDS   TEMPORARY
BASIN: Boulder Creek     PHYSICAL
INORGANIC
    METALS   MODIFICATIONS
      and
mg/l
  ug/l   AND
Stream Segment Description     BIOLOGICAL           QUALIFICATIONS
1. All tributaries to Boulder Creek, OW Aq Life Cold 1 D.O.=6.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
including all lakes, reservoirs, and wetlands,   Recreation 1a D.O.(sp)=7.0 mg/l NH3 (ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=10(Trec)  
within the Indian Peaks Wilderness Area.   Water Supply pH=6.5-9.0 Cl2 (ac)=0.019 NO2 =0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS  
    Agriculture F.Coli=200/100ml Cl2 (ch)=0.011 NO3 =10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr)  
      E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
          SO4 =WS Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
2. Mainstem of Boulder Creek, including all   Aq Life Cold 1 D.O.=6.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
tributaries, lakes, reservoirs, and wetlands, from the    Recreation 1a D.O.(sp)=7.0 mg/l NH3 (ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=10(Trec)  
boundary of the Indian Peaks Wilderness   Water Supply pH=6.5-9.0 Cl2 (ac)=0.019 NO2 =0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS  
Area to a point immediately above the   Agriculture F.Coli=200/100ml Cl2 (ch)=0.011 NO3 =10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr)  
confluence with South Boulder Creek, except     E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
for the specific listings in Segment 3 and 12.         SO4 =WS Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
3. Mainstem of Middle Boulder Creek,   Aq Life Cold 1 D.O.=6.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
including all tributaries, lakes, reservoirs, and   Recreation 1a D.O.(sp)=7.0 mg/l NH3 (ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=10(Trec)  
wetlands, from the source to the outlet of Barker   Water Supply pH=6.5-9.0 Cl2 (ac)=0.019 NO2 =0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS  
Reservoir.   Agriculture F.Coli=200/100ml Cl2 (ch)=0.011 NO3 =10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr)  
      E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
          SO4 =WS Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
4a. Mainstem of South Boulder Creek,   Aq Life Cold 1 D.O.=6.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
including all tributaries, lakes, reservoirs, and   Recreation 1a D.O.(sp)=7.0 mg/l NH3 (ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=10(Trec)  
wetlands, from the source to the outlet of Gross   Water Supply pH=6.5-9.0 Cl2 (ac)=0.019 NO2 =0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS  
Reservoir.   Agriculture F.Coli=200/100ml Cl2 (ch)=0.011 NO3 =10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr)  
      E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
          SO4 =WS Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
4b. Mainstem of South Boulder Creek,   Aq Life Cold 1 D.O.=6.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
including all tributaries, lakes, and reservoirs,   Recreation 1a D.O.(sp)=7.0 mg/l NH3 (ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=10(Trec)  
from the outlet of Gross Reservoir to South   Water Supply pH=6.5-9.0 Cl2 (ac)=0.019 NO2 =0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS  
Boulder Road, except for specific   Agriculture F.Coli=200/100ml Cl2 (ch)=0.011 NO3 =10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr)  
listings in Segments 4c and 4d.     E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
          SO4 =WS Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
4c. Mainstem of Cowdrey Drainage from  UP Aq Life Warm 2 D.O.=5.0 mg/l CN=0.2 NO3 =10 As(ac)=50 Cu(ch)=1000 Se(ch)=10 All Metals Trec
the source below Cowdrey Reservoir #2 to   Recreation 1a pH=6.5-9.0 F=2 Cl=320 Ba(ac)=1000 Fe(ch)=WS(dis) Ag(ac)=50 unless otherwise
the Davidson Ditch.   Water Supply F.Coli=200/100ml NO2 =1.0 SO4 =WS Cd(ac)=10 Pb(ac)=50 Zn(ch)=5000 noted.
    Agriculture E.Coli=126/100ml     CrIII(ac)=50 Mn(ch)=WS(dis)    
                   
4d. Mainstem of Cowdrey Drainage from UP Aq Life Warm 2 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
immediately downstream of the Davidson   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.06 B=0.75 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Se(ac/ch)=TVS  
Ditch to the confluence with South Boulder   Water Supply F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ac/ch)=TVS  
Creek.   Agriculture E.Coli=126/100ml Cl2 (ch)=0.011 NO3 =10 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
        CN=0.003 Cl=320 Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
          SO4 =WS        
5. Mainstem of South Boulder Creek from UP Aq Life Warm 1 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50 Fe(ch)=WS(dis) Ni(ac/ch)=TVS All Metals Trec
 South Boulder Road to the confluence   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.06 B=0.75 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Se(ac/ch)=TVS unless otherwise
with Boulder Creek.   Water Supply F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ac/ch)=TVS noted.
    Agriculture E.Coli=126/100ml Cl2 (ch)=0.011 NO3 =10 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
        CN=0.005 Cl=250 Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
6. Mainstem of Coal Creek, including all UP Aq Life Cold 2 D.O.=6.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=300(dis) Ni(ac/ch)=TVS  
tributaries, lakes, reservoirs, and wetlands, from the   Recreation 1a D.O.(sp)=7.0 mg/l NH3 (ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS  
source to highway 93.   Water Supply pH=6.5-9.0 Cl2 (ac)=0.019 NO2 =0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS  
    Agriculture F.Coli=200/100ml Cl2 (ch)=0.011 NO3 =10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr)  
      E.Coli=126/100ml CN=0.2 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS  
          SO4 =WS Cu(ac/ch)=TVS Hg(ch)=0.01(Tot)    
7a. Mainstem of Coal Creek from highway 93 UP Aq Life Warm 1 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec) Ni(ac/ch)=TVS  
 to highway 36 (Boulder Turnpike).   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.06 B=0.75 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Se(ac/ch)=TVS  
    Agriculture F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ac/ch)=TVS  
      E.Coli=126/100ml Cl2 (ch)=0.011   CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS  
        CN=0.005   Cu(ac/ch)=TVS      
7b. Mainstem of Coal Creek from Highway 36 UP Aq Life Warm 2 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec) Ni(ac/ch)=TVS  
to the confluence with Boulder Creek.   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.06 B=0.75 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Se(ac/ch)=TVS  
    Agriculture F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ac/ch)=TVS  
      E.Coli=126/100ml Cl2 (ch)=0.011   CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS  
        CN=0.005   Cu(ac/ch)=TVS      
8. All tributaries to South Boulder Creek, including UP Aq Life Warm 2 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ch)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
all lakes, reservoirs, and wetlands, from South   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.10 B=0.75 Cd(ac/ch)=TVS Fe(ch)=1000(Trec) Se(ac/ch)=TVS  
Boulder Road to the confluence with Boulder   Agriculture F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS  
Creek and all tributaries to Coal Creek, including     E.Coli=126/100ml Cl2 (ch)=0.011 NO3 =10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS  
all lakes, reservoirs, and wetlands, from Highway       CN=0.005 Cl=250 Cu(ac/ch)=TVS Mn(ch)=WS(dis)    
93 to the confluence with Boulder Creek.         SO4 =WS   Hg(ch)=0.01(Tot)    
9. Mainstem of Boulder Creek from a point   Aq Life Warm 1 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
immediately above the confluence with   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.06 B=0.75 Cd(ac/ch)=TVS Fe(ch)=1000(Trec) Se(ac/ch)=TVS  
South Boulder Creek to the confluence with   Water Supply F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS  
Coal Creek.   Agriculture E.Coli=126/100ml Cl2 (ch)=0.011 NO3 =10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS  
        CN=0.005 Cl=250 Cu(ac/ch)=TVS Mn(ch)=WS(dis)    
          SO4 =WS   Hg(ch)=0.01(Tot)    
10. Mainstem of Boulder Creek from the UP Aq Life Warm 1 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
confluence with Coal Creek to the confluence   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.06 B=0.75 Cd(ac/ch)=TVS Fe(ch)=1000(Trec) Se(ac/ch)=TVS  
with St. Vrain Creek.   Water Supply F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS  
    Agriculture E.Coli=126/100ml Cl2 (ch)=0.011 NO3 =10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS  
        CN=0.005 Cl=250 Cu(ac/ch)=TVS Mn(ch)=WS(dis)    
          SO4 =WS   Hg(ch)=0.01(Tot)    
11. All tributaries to Boulder Creek from a UP Aq Life Warm 2 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
point immediately above the confluence with   Recreation 1a pH=6.5-9.0 NH3 (ch)=0.10 B=0.75 Cd(ac/ch)=TVS Fe(ch)=1000(Trec) Se(ac/ch)=TVS  
South Boulder Creek to the confluence with   Agriculture F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS  
 St. Vrain Creek, except for specific     E.Coli=126/100ml Cl2 (ch)=0.011 NO3 =10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS  
listings in Segments 5 and 7.       CN=0.005 Cl=250 Cu(ac/ch)=TVS Mn(ch)=WS(dis)    
          SO4 =WS Hg(ch)=0.01(Tot)    
12. Boulder Reservoir and Coot Lake.   Aq Life Warm 1 D.O.=5.0 mg/l NH3 (ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS  
    Recreation 1a pH=6.5-9.0 NH3 (ch)=0.06 B=0.75 Cd(ac/ch)=TVS Fe(ch)=1000(Trec) Se(ac/ch)=TVS  
    Water Supply F.Coli=200/100ml Cl2 (ac)=0.019 NO2 =0.5 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS  
    Agriculture E.Coli=126/100ml Cl2 (ch)=0.011 NO3 =10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS  
        CN=0.005 Cl=250 Cu(ac/ch)=TVS Mn(ch)=WS(dis)    
          SO4 =WS   Hg(ch)=0.01(Tot)    
For an explanation of the stream classification system see the BASIN discussion on applicable water quality standards . Explanation of table abbreviations and additional information, see Regulation 38 at http://www.cdphe.state.co.us/op/regs/waterqualityregs.asp.        

INVITATION BASIN is a community project actively seeking public participation. We appreciate all feedback and welcome comments, suggestions and contributions. To find out more about how you can be involved, click here. Help BASIN serve your needs, take our "10 questions in 10 seconds" survey.

BASIN is supported by the US EPA, the City of Boulder, the Keep it Clean Partnership, BCWI and BCN

Home | Site Map | Glossary | Bibliography | Contributors
About BASIN | Attribution | Feedback | Search
Last Page Update - Tuesday December 27, 2005