5 Colo. Code Regs. § 1002-38.5
All waters of the South Platte, Laramie, Republican and Smoky Hill River Basins are subject to the following standard for temperature. (Discharges regulated by permits, which are within the permit limitations, shall not be subject to enforcement proceedings under this standard.) Temperature shall maintain a normal pattern of diurnal and seasonal fluctuations with no abrupt changes and shall have no increase in temperature of a magnitude, rate, and duration deemed deleterious to the resident aquatic life. This standard shall not be interpreted or applied in a manner inconsistent with section 25-8-104, C.R.S.
See Basic Standards and Methodologies for Surface Water for a listing of organic standards at 31.11 Table B and metal standards found at 31.16 Table III. The column in the tables headed "Water + Fish" are presumptively applied to all Aquatic Life Class 1 streams which also have a Water Supply classification, and are applied to Aquatic Life Class 2 streams which also have a Water Supply classification, on a case-by-case basis as shown in Appendix 38-1. The column in the tables at 31.11 headed "Fish Ingestion" is presumptively applied to all Aquatic Life Class 1 streams which do not have a Water Supply classification, and are applied to Aquatic Life Class 2 streams which do not have a Water Supply classification, on a case-by-case basis, as shown in Appendix 38-1.
Prior to December 31, 2022 for chlorophyll a and prior to December 31, 2027 for total phosphorus, interim nutrient values will be considered for adoption only in the limited circumstances defined at 31.17(e), (f), and (g). These circumstances include headwaters, Direct Use Water Supply (DUWS) Lakes and Reservoirs, and other special circumstances determined by the Commission. After December 31, 2022, total nitrogen will be considered for adoption per the circumstances outlined in 31.17(g) and (h).
Prior to December 31, 2027, nutrient criteria will be adopted for headwaters on a segment by segment basis for the South Platte River Basin. Moreover, pursuant to 31.17(e), nutrient standards will only be adopted for waters upstream of all permitted domestic wastewater treatment facilities discharging prior to May 31, 2012 or with preliminary effluent limits requested prior to May 31, 2012, and any non-domestic facilities subject to Regulation 85 effluent limits and discharging prior to May 31, 2012. The following is a list of all permitted domestic wastewater treatment facilities discharging prior to May 31, 2012 or with preliminary effluent limits requested prior to May 31, 2012, and any non-domestic facilities subject to Regulation 85 effluent limits and discharging prior to May 31, 2012 in the South Platte River Basin:
Segment | Permittee | Facility name | Permit No. |
COSPUS01a | Alma Town of | Alma, Town of | CO0035769 |
COSPUS01a | Fairplay Sanitation District | Fairplay Sanitation District WWTF | CO0040088 |
COSPUS01a | Boy Scouts of America Pikes Peak Council | Camp Alexander | COG588036 |
COSPUS02a | Florissant Water and San Dist | Florissant Water and San Dist | CO0041416 |
COSPUS02a | Teller County | Teller County WW Utility Board | CO0044211 |
COSPUS03 | Woodland Park City of | Woodland Park, City of | CO0043214 |
COSPUS03 | YMCA Camp Shady Brook | Camp Shady Brook | CO0045993 |
COSPUS03 | Lost Valley Ranch Corporation | Lost Valley Ranch | COG588122 |
COSPUS04 | Will-O-Wisp Metro District | Will-O-Wisp Metro District | CO0041521 |
COSPUS04 | Bailey WSD | Bailey WSD WWTF | COG588056 |
COSPUS04 | Platte Canyon School Dist 1 | Platte Canyon School Dist 1 | COG588114 |
COSPUS05c | Mountain Water and Sanitation District | Mountain Water & Sanitation District | CO0022730 |
COSPUS06a | Roxborough Water and Sanitation District | Roxborough Park Water & San WWTF | CO0041645 |
COSPUS10a | Plum Creek Water Reclamation Authority | Plum Creek WW Authority WWTF | CO0038547 |
COSPUS10a | Perry Park Water and Sanitation District | Sageport WWTF | CO0043044 |
COSPUS11b | Perry Park Water and Sanitation District | Waucondah WWTP | CO0022551 |
COSPUS14 | Littleton/Englewood Cities of | Littleton/Englewood, Cities of | CO0032999 |
COSPUS15 | Metro Waste Water Reclamation District | Metro Wastewater Reclamation District | CO0026638 |
COSPUS15 | Brighton City of | Brighton WWTF | CO0021547 |
COSPUS15 | South Adams County WSD | Williams Monoco WWTF | CO0026662 |
COSPUS15 | Metro Waste Water Reclamation District | Northern Treatment Plant | CO0048959 |
COSPUS16c | Ascentia Real Estate Holding Company LLC | Foxridge Farms MH Community | CO0028908 |
COSPUS16c | SouthWest Water Company | Hi-Land Acres W&SD WWTF | COG589072 |
COSPUS16c | Mile High Racing and Enter dba Arapahoe Park | Arapahoe Park Racetrack | COG589073 |
COSPUS16c | Rangeview Metro District | Coal Creek WW Reclamation Fac | COG589108 |
COSPUS16g | Centennial Water and San Dist | Marcy Gulch WWTF | CO0037966 |
COSPUS16i | Aurora City of - Aurora Water | Sand Creek Water Reuse Facility | CO0026611 |
COSPCH01 | Stonegate Village Metropolitan District | Stonegate Village WWTF | CO0040291 |
COSPCH01 | Pinery Water and Wastewater District | Pinery WWTF | CO0041092 |
COSPCH01 | Parker Water and Sanitation District | Parker North WRF | CO0046507 |
COSPCH04 | Arapahoe County W and WW Authority | Lone Tree Creek WWTP | CO0040681 |
COSPBE01a | Amen Real Estate LLC | Singin' River Ranch WWTF | CO0035971 |
COSPBE01b | Morrison Town of | Morrison Town of | CO0041432 |
COSPBE01e | Kittredge Sanitation and Water District | Kittredge San & Water District | CO0023841 |
COSPBE01e | Bruce & Jayne Hungate DBA Bear Creek Cabins | Bear Creek Cabins | CO0030856 |
COSPBE01e | Evergreen Metropolitan District | Evergreen Metropolitan Dist WWTF | CO0031429 |
COSPBE04a | Genesee WSD | Genesee Water & San District | CO0022951 |
COSPBE04a | Forest Hills Metro District | Forest Hills Metropolitan Dis | CO0037044 |
COSPBE05 | West Jefferson County MD | W. Jefferson County Metro Dist | CO0020915 |
COSPBE05 | Historic Brook Forest Inn LLC | Brook Forest Inn | CO0030261 |
COSPBE06a | Tiny Town Foundation Inc | Tiny Town | CO0036129 |
COSPBE06a | Aspen Park Metropolitan District | Aspen Park Metropolitan District | CO0000001 |
COSPBE06b | Jefferson County Public Schools R-1 | Conifer High School WW Rec Plt | CO0047988 |
COSPCL01 | Colorado Dept of Transportation | Eisenhower/Johnson Memorial Tunnels | CO0026069 |
COSPCL01 | Clear Creek Skiing Corp | Loveland Ski Area WWTF | CO0040835 |
COSPCL02a | Georgetown Town of | Georgetown WWTF | CO0027961 |
COSPCL02c | Central Clear Creek SD | Central Clear Creek SD WWTF | COG588055 |
COSPCL05 | Empire Town of | Empire Town of | COG588065 |
COSPCL09a | St Marys Glacier WSD | St Mary's Glacier WSD | CO0023094 |
COSPCL10 | Shwayder Camp Wastewater | Shwayder Camp WWTF | CO0047473 |
COSPCL11 | Idaho Springs City of | Idaho Springs WWTF | CO0041068 |
COSPCL12b | Clear Creek WWTP | Clear Creek WWTP | CO0046574 |
COSPCL13b | Black Hawk/Central City Sanitation District | Black Hawk/Central City SD WWTF | CO0046761 |
COSPCL14a | MillerCoors LLC | MillerCoors Golden Facility | CO0001163 |
COSPBD01 | Westminster City of | Big Dry Creek WWTF | CO0024171 |
COSPBD01 | Broomfield City and County | Broomfield WWTF | CO0026409 |
COSPBD01 | Northglenn City of | Northglenn WWTF | CO0036757 |
COSPBO02b | San Lazaro Park Properties LLP c/o | San Lazaro MHP WWTF | CO0020184 |
COSPBO02b | BaseCamp Ventures LLC | Boulder Mountain Lodge WWTF | CO0040819 |
COSPBO02b | Mueller Red Lion Inn | Red Lion Inn WWTF | COG588118 |
COSPBO03 | Nederland Town of | Nederland Town of WWTF | CO0020222 |
COSPBO04b | Eldorado Springs Wastewater | Eldorado Springs WWTF | CO0047651 |
COSPBO04b | San Souci MHP | San Souci MHP | COG588101 |
COSPBO07b | Louisville City of | Louisville WWTF | CO0023078 |
COSPBO07b | Lafayette City of | Lafayette WWTF | CO0023124 |
COSPBO07b | Erie Town of | Erie WWTF | CO0045926 |
COSPBO08 | Superior Metropolitan District No 1 | Superior Metropolitan Dist No1 | CO0043010 |
COSPBO09 | Boulder City of | 75TH ST WWTP | CO0024147 |
COSPBO10 | Erie Town of | Erie North Water Reclamation Facility | CO0048445 |
COSPBO10 | B & B Mobile Home and RV Park | B & B Mobile Home & RV Park | COG588107 |
COSPBO14 | Lake Eldora WSD | Lake Eldora WSD WWTF | CO0020010 |
COSPSV02a | Peaceful Valley Ranch LLC | Peaceful Valley Ranch WWTF | CO0048828 |
COSPSV02a | Seventh-Day Adventist Assoc of Colorado | Glacier View Ranch | CO0030112 |
COSPSV02a | Aspen Lodge at Estes Park Corp | Aspen Lodge at Estes Park Corp | CO0042820 |
COSPSV02b | Lyons Town of | Lyons Town of | CO0020877 |
COSPSV03 | Longmont City of | Longmont WWTF | CO0026671 |
COSPSV03 | St Vrain Sanitation District | St Vrain Sanitation District | CO0041700 |
COSPSV06a | Fairways Metro Dist | Fairways WWTF | CO0048411 |
COSPSV06b | Niwot Sanitation District | Niwot Sanitation District | CO0021695 |
COSPSV06b | Mead Town of | Lake Thomas Subdivision WWTF | CO0046868 |
COSPSV06b | Mead Town of | Mead, Town of | CO0046876 |
COSPMS01a | Fort Lupton City of | Fort Lupton WWTF | CO0021440 |
COSPMS01a | Platteville Town of | Platteville WWTF | CO0040355 |
COSPMS01b | Evans City of | Evans City of WWTF | CO0020508 |
COSPMS01b | Kersey Town of | Kersey WWTF | CO0021954 |
COSPMS01b | Evans City of | Hill-N-Park Sanitation Dist. | CO0047287 |
COSPMS01b | La Salle Town of | La Salle Town of | COG588058 |
COSPMS01b | Gilcrest Town of | Gilcrest WWTF | COG588121 |
COSPMS03a | Elizabeth Town of | Gold Creek | COG589037 |
COSPMS03a | Galeton Water and Sanitation District | Galeton Water & San District | CO0043320 |
COSPMS03a | Orica USA Inc | Orica USA, Inc. | CO0046221 |
COSPMS03a | Spring Valley Ranch | Spring Valley Ranch WWTF | CO0046965 |
COSPMS03a | Front Range Airport WWTF | Front Range Airport WWTF | CO0047741 |
COSPMS04 | Lochbuie Town of | Lochbuie Town of | CO0047198 |
COSPMS05a | Swift Beef Company | Swift Beef - Lone Tree | CO0027707 |
COSPMS05c | Hudson WWTF | Hudson Mechanical WWTF | COG589104 |
COSPMS06 | Keenesburg Town of | Keenesburg Town of | CO0041254 |
COSPMS06 | Bennett Town of | Bennett Town of | COG589069 |
COSPBT02 | Estes Park Sanitation District | Estes Park Sanitation District | CO0020290 |
COSPBT02 | Upper Thompson Sanitation District | UTSD WWTF | CO0031844 |
COSPBT04 | Loveland City of | Loveland WWTP | CO0026701 |
COSPBT05 | Milliken Town of | Milliken Sanitation District | CO0042528 |
COSPBT05 | Johnstown Town of | Low Point WWTP | CO0047058 |
COSPBT07 | Hidden View Estates HOA | Hidden View Estates HOA WWTF | CO0048861 |
COSPBT09 | Johnstown Town of | Johnstown Central WWTF | CO0021156 |
COSPBT09 | Riverglen Homeowners Assoc | Riverglen HOA WWTF | CO0029742 |
COSPBT09 | Berthoud Town of | Berthoud Town of | CO0046663 |
COSPBT10 | Berthoud Town of | Serenity Ridge WWTF | CO0047007 |
COSPBT10 | Western Mini-Ranch/Vaquero Estates Sewer Assoc. | Western Mini-Ranch/Vaquero Est | COG589095 |
COSPBT10 | Berthoud Estates Community Assoc | Berthoud Estates WWTF | COG589097 |
COSPCP08 | Fox Acres Community Services Corp | Fox Acres WWTF | COG589112 |
COSPCP08 | Girl Scouts of Colorado | Magic Sky Ranch G.S. Camp | CO0047317 |
COSPCP11 | Fort Collins City of | Mulberry WWTP | CO0026425 |
COSPCP11 | Fort Collins City of | Drake WWTP | CO0047627 |
COSPCP12a | Windsor, Town of | Windsor Town of WWTF | CO0020320 |
COSPCP12b | Greeley City of | Greeley City of | CO0040258 |
COSPCP12b | Leprino Foods Company | Leprino Greeley Facility WWTF | CO0048860 |
COSPCP13a | Anheuser Busch Inc | Nutri-Turf, Inc. | CO0039977 |
COSPCP13a | Eaton Town of | Eaton, Town of | CO0047414 |
COSPCP13a | Saddler Ridge Metro Dist Water Reclamation Facility | Saddler Ridge Metro Dist Water Reclamation Facility | COG589107 |
COSPCP13c | Boxelder Sanitation District | Boxelder Sanitation District WWTF | CO0020478 |
COSPCP13c | Wellington Town of | Wellington WWTF | CO0046451 |
COSPCP22 | South Fort Collins Sanitation District | South Fort Collins San Dist | CO0020737 |
COSPLS01a | Western Sugar Cooperative | Fort Morgan Facility | CO0041351 |
COSPLS01a | Cargill Meat Solutions | Fort Morgan Beef Plant | CO0044270 |
COSPLS01a | Brush City of | Brush City of | CO0021245 |
COSPLS01a | Fort Morgan City of | Fort Morgan City of | CO0044849 |
COSPLS01a | Snyder Sanitation District | Snyder Sanitation District | COG588016 |
COSPLS01a | Morgan Heights WSD | Morgan Heights Water & Sewer Inc. | COG588040 |
COSPLS01b | Julesburg Town of | Julesburg Town of | CO0021113 |
COSPLS01b | Sterling City of | Sterling City of | CO0026247 |
COSPLS01b | Ovid Town of | Ovid Town of | COG588106 |
COSPLS02 | Leprino Foods Company | Fort Morgan Cheese Facility | CO0043958 |
COSPLS02 | Deer Trail Town of | Deer Trail WWTF | COG589002 |
COSPLS02 | Hillrose Town of | Hillrose WWTF | COG589030 |
COSPLS02 | Byers Water and Sanitation District | Byers Water and Sanitation District | COG589033 |
COSPLS02 | Eastern Adams County Metro District | Eastern Adams CO Metro Dist WWTF | COG589035 |
COSPLS02 | Kiowa Town of | Kiowa WWTF | CO0033405 |
COSPLS02 | Elbert Water Sanitation District | Elbert Water Sanitation District WWTF | COG589065 |
COSPRE03 | Wray City of | Wray City of | CO0023833 |
COSPRE06 | Flagler Town of | Flagler WWTF | COG589036 |
COSPRE06 | Arriba Town of | Arriba WWTF | COG589055 |
COSPRE06 | Holyoke City of | Holyoke, City of | COG589059 |
COSPRE06 | Akron Town of | Akron WWTF | COG589061 |
COSPRE06 | Haxtun Town of | Haxtun. Town of | COG589062 |
COSPRE06 | Stratton Town of | Stratton WWTF | COG589100 |
COSPRE06 | Burlington City of | Burlington City of WWTF | COG589114 |
COSPRE06 | Seibert Town of | Seibert WWTF | COG589120 |
COSPRE07 | Cheyenne Wells Sanitation District No 1 | Cheyenne Wells Sanitation District | COG589039 |
Unclassified | Silco Oil Co | Tomahawk Truck Stop | COG589003 |
Prior to December 31, 2027:
* For segments located entirely above these facilities, nutrient standards apply to the entire segment.
* For segments with portions downstream of these facilities, nutrient standards only apply above these facilities. A note was added to the total phosphorus and chlorophyll a standards in these segments. The note references the table of qualified facilities at 38.5(4).
* For segments located entirely below these facilities, nutrient standards do not apply.
A note was added to the total phosphorus and chlorophyll a standards in lakes segments as nutrients standards apply only to lakes and reservoirs larger than 25 acres surface area.
5 CCR 1002-38.5