June 17, 2026
Nitrates in Colorado Drinking Water 2026
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Nitrates in Colorado Drinking Water 2026
Nitrates contamination has been detected in drinking water systems across Colorado. High nitrate levels cause methemoglobinemia (blue baby syndrome) in infants. EPA MCL is 10 mg/L. Our analysis of Colorado water quality reports found Nitrates present in 390 cities and water systems statewide. If you live in one of these communities, a certified home filter can significantly reduce your exposure -- browse Nitrates filters at PureWaterGuys.
Cities in Colorado with Nitrates Detected
The following 390 water systems in Colorado reported Nitrates in their annual water quality reports. Click any city to read the full report.
| City / Water System | Water Quality Report |
|---|---|
| Administrative Contact Co Water Quality Report 2026 | View Report |
| Agate Co Water Quality Report 2026 | View Report |
| Aguilar Co Water Quality Report 2026 | View Report |
| Akron Co Water Quality Report 2026 | View Report |
| Alamosa Co Water Quality Report 2026 | View Report |
| Allenspark Co Water Quality Report 2026 | View Report |
| Alma Co Water Quality Report 2026 | View Report |
| Almont Co Water Quality Report 2026 | View Report |
| Anitonito Co Water Quality Report 2026 | View Report |
| Antonito Co Water Quality Report 2026 | View Report |
| Anvil Points Ii Co Water Quality Report 2026 | View Report |
| Arapahoe Co Water Quality Report 2026 | View Report |
| Arvada Co Water Quality Report 2026 | View Report |
| Aspen Co Water Quality Report 2026 | View Report |
| Ault Co Water Quality Report 2026 | View Report |
| Aurora Co Water Quality Report 2026 | View Report |
| Austin Co Water Quality Report 2026 | View Report |
| Avon Co Water Quality Report 2026 | View Report |
| Aztec Co Water Quality Report 2026 | View Report |
| Bailey Co Water Quality Report 2026 | View Report |
| Basalt Co Water Quality Report 2026 | View Report |
| Bayfield Co Water Quality Report 2026 | View Report |
| Bennett Co Water Quality Report 2026 | View Report |
| Berthoud Co Water Quality Report 2026 | View Report |
| Bethune Co Water Quality Report 2026 | View Report |
| Beulah Co Water Quality Report 2026 | View Report |
| Black Forest Co Water Quality Report 2026 | View Report |
| Black Hawk Co Water Quality Report 2026 | View Report |
| Blanca Co Water Quality Report 2026 | View Report |
| Bloomfield Hills Co Water Quality Report 2026 | View Report |
| Boise Co Water Quality Report 2026 | View Report |
| Boone Co Water Quality Report 2026 | View Report |
| Boone Ii Co Water Quality Report 2026 | View Report |
| Boulder Co Water Quality Report 2026 | View Report |
| Boulder Ii Co Water Quality Report 2026 | View Report |
| Brandon Co Water Quality Report 2026 | View Report |
| Branson Co Water Quality Report 2026 | View Report |
| Breckenridge Co Water Quality Report 2026 | View Report |
| Briggsdale Co Water Quality Report 2026 | View Report |
| Brighton Co Water Quality Report 2026 | View Report |
| Bristol Co Water Quality Report 2026 | View Report |
| Brookside Co Water Quality Report 2026 | View Report |
| Broomfield Co Water Quality Report 2026 | View Report |
| Buena Vista Co Water Quality Report 2026 | View Report |
| Buffalo Creek Co Water Quality Report 2026 | View Report |
| Burlington Co Water Quality Report 2026 | View Report |
| Byers Co Water Quality Report 2026 | View Report |
| Calhan Co Water Quality Report 2026 | View Report |
| Campo Co Water Quality Report 2026 | View Report |
| Canon City Co Water Quality Report 2026 | View Report |
| Carbondale Co Water Quality Report 2026 | View Report |
| Castle Pines Co Water Quality Report 2026 | View Report |
| Castle Rock Co Water Quality Report 2026 | View Report |
| Cedaredge Co Water Quality Report 2026 | View Report |
| Centennial Co Water Quality Report 2026 | View Report |
| Center Co Water Quality Report 2026 | View Report |
| Central City Co Water Quality Report 2026 | View Report |
| Cheraw Co Water Quality Report 2026 | View Report |
| Cherry Hills Village Co Water Quality Report 2026 | View Report |
| Cheyenne Wells Co Water Quality Report 2026 | View Report |
| Chromo Co Water Quality Report 2026 | View Report |
| Cimarron Co Water Quality Report 2026 | View Report |
| Clark Co Water Quality Report 2026 | View Report |
| Clifton Co Water Quality Report 2026 | View Report |
| Coal Creek Co Water Quality Report 2026 | View Report |
| Cokedale Co Water Quality Report 2026 | View Report |
| Collbran Co Water Quality Report 2026 | View Report |
| Colo City Co Water Quality Report 2026 | View Report |
| Colo Spgs Co Water Quality Report 2026 | View Report |
| Colo Springs Co Water Quality Report 2026 | View Report |
| Colorado City Co Water Quality Report 2026 | View Report |
| Colorado Prings Co Water Quality Report 2026 | View Report |
| Colorado Springs Co Water Quality Report 2026 | View Report |
| Commerce City Co Water Quality Report 2026 | View Report |
| Conejos Co Water Quality Report 2026 | View Report |
| Conifer Co Water Quality Report 2026 | View Report |
| Copper Mountain Co Water Quality Report 2026 | View Report |
| Cortez Co Water Quality Report 2026 | View Report |
| Craig Co Water Quality Report 2026 | View Report |
| Crawford Co Water Quality Report 2026 | View Report |
| Creede Co Water Quality Report 2026 | View Report |
| Crested Butte Co Water Quality Report 2026 | View Report |
| Crestone Co Water Quality Report 2026 | View Report |
| Cripple Creek Co Water Quality Report 2026 | View Report |
| Crook Co Water Quality Report 2026 | View Report |
| Crowley Co Water Quality Report 2026 | View Report |
| Dacono Co Water Quality Report 2026 | View Report |
| Debeque Co Water Quality Report 2026 | View Report |
| Deer Trail Co Water Quality Report 2026 | View Report |
| Del Norte Co Water Quality Report 2026 | View Report |
| Delta Co Water Quality Report 2026 | View Report |
| Denver Co Water Quality Report 2026 | View Report |
| Detroit Lakes Co Water Quality Report 2026 | View Report |
| Dillon Co Water Quality Report 2026 | View Report |
| Dinosaur Co Water Quality Report 2026 | View Report |
| Divide Co Water Quality Report 2026 | View Report |
| Dolores Co Water Quality Report 2026 | View Report |
| Dove Creek Co Water Quality Report 2026 | View Report |
| Dumont Co Water Quality Report 2026 | View Report |
| Durango Co Water Quality Report 2026 | View Report |
| Duranto Co Water Quality Report 2026 | View Report |
| Eads Co Water Quality Report 2026 | View Report |
| Eagle Co Water Quality Report 2026 | View Report |
| Eastlake Co Water Quality Report 2026 | View Report |
| Eaton Co Water Quality Report 2026 | View Report |
| Eckley Co Water Quality Report 2026 | View Report |
| Edgewater Co Water Quality Report 2026 | View Report |
| Edwards Co Water Quality Report 2026 | View Report |
| El Jebel Co Water Quality Report 2026 | View Report |
| El Paso Co Water Quality Report 2026 | View Report |
| Elbert Co Water Quality Report 2026 | View Report |
| Eldorado Spgs Co Water Quality Report 2026 | View Report |
| Elizabeth Co Water Quality Report 2026 | View Report |
| Empire Co Water Quality Report 2026 | View Report |
| Englewood Co Water Quality Report 2026 | View Report |
| Erie Co Water Quality Report 2026 | View Report |
| Estes Park Co Water Quality Report 2026 | View Report |
| Evans Co Water Quality Report 2026 | View Report |
| Evergreen Co Water Quality Report 2026 | View Report |
| Fairplay Co Water Quality Report 2026 | View Report |
| Falcon Co Water Quality Report 2026 | View Report |
| Farmington Co Water Quality Report 2026 | View Report |
| Farmington Hills Co Water Quality Report 2026 | View Report |
| Federal Heights Co Water Quality Report 2026 | View Report |
| Fire Stone Co Water Quality Report 2026 | View Report |
| Firestone Co Water Quality Report 2026 | View Report |
| Flagler Co Water Quality Report 2026 | View Report |
| Fleming Co Water Quality Report 2026 | View Report |
| Florence Co Water Quality Report 2026 | View Report |
| Florissant Co Water Quality Report 2026 | View Report |
| Fort Carson Co Water Quality Report 2026 | View Report |
| Fort Collins Co Water Quality Report 2026 | View Report |
| Fort Lupton Co Water Quality Report 2026 | View Report |
| Fort Morgan Co Water Quality Report 2026 | View Report |
| Fort Smith Co Water Quality Report 2026 | View Report |
| Fountain Co Water Quality Report 2026 | View Report |
| Fowler Co Water Quality Report 2026 | View Report |
| Foxfield Co Water Quality Report 2026 | View Report |
| Franktown Co Water Quality Report 2026 | View Report |
| Fraser Co Water Quality Report 2026 | View Report |
| Frederick Co Water Quality Report 2026 | View Report |
| Frisco Co Water Quality Report 2026 | View Report |
| Fruita Co Water Quality Report 2026 | View Report |
| Fruitland Co Water Quality Report 2026 | View Report |
| Ft Collins Co Water Quality Report 2026 | View Report |
| Ft Garland Co Water Quality Report 2026 | View Report |
| Ft Morgan Co Water Quality Report 2026 | View Report |
| Galeton Co Water Quality Report 2026 | View Report |
| Garcia Co Water Quality Report 2026 | View Report |
| Gateway Co Water Quality Report 2026 | View Report |
| Genoa Co Water Quality Report 2026 | View Report |
| Georgetown Co Water Quality Report 2026 | View Report |
| Gilbert Co Water Quality Report 2026 | View Report |
| Gilcrest Co Water Quality Report 2026 | View Report |
| Gilman Co Water Quality Report 2026 | View Report |
| Glendale Co Water Quality Report 2026 | View Report |
| Glenwood Spgs Co Water Quality Report 2026 | View Report |
| Glenwood Springs Co Water Quality Report 2026 | View Report |
| Golden Co Water Quality Report 2026 | View Report |
| Granada Co Water Quality Report 2026 | View Report |
| Granby Co Water Quality Report 2026 | View Report |
| Grand Juction Co Water Quality Report 2026 | View Report |
| Grand Junction Co Water Quality Report 2026 | View Report |
| Grand Lake Co Water Quality Report 2026 | View Report |
| Greeley Co Water Quality Report 2026 | View Report |
| Green Mtn Falls Co Water Quality Report 2026 | View Report |
| Greenwood Village Co Water Quality Report 2026 | View Report |
| Gunnison Co Water Quality Report 2026 | View Report |
| Gunnison Ii Co Water Quality Report 2026 | View Report |
| Gypsum Co Water Quality Report 2026 | View Report |
| Hasty Co Water Quality Report 2026 | View Report |
| Haswell Co Water Quality Report 2026 | View Report |
| Haxtun Co Water Quality Report 2026 | View Report |
| Hayden Co Water Quality Report 2026 | View Report |
| Henderson Co Water Quality Report 2026 | View Report |
| Hesperus Co Water Quality Report 2026 | View Report |
| Highlands Ranch Co Water Quality Report 2026 | View Report |
| Hillrose Co Water Quality Report 2026 | View Report |
| Holly Co Water Quality Report 2026 | View Report |
| Holyoke Co Water Quality Report 2026 | View Report |
| Hot Sulphur Spgs Co Water Quality Report 2026 | View Report |
| Hot Sulphur Springs Co Water Quality Report 2026 | View Report |
| Hotchkiss Co Water Quality Report 2026 | View Report |
| Hudson Co Water Quality Report 2026 | View Report |
| Hugo Co Water Quality Report 2026 | View Report |
| Idaho Springs Co Water Quality Report 2026 | View Report |
| Ignacio Co Water Quality Report 2026 | View Report |
| Iliff Co Water Quality Report 2026 | View Report |
| Indian Hills Co Water Quality Report 2026 | View Report |
| Irvine Co Water Quality Report 2026 | View Report |
| Jamestown Co Water Quality Report 2026 | View Report |
| Johnstown Co Water Quality Report 2026 | View Report |
| Julesburg Co Water Quality Report 2026 | View Report |
| Karval Co Water Quality Report 2026 | View Report |
| Keenesburg Co Water Quality Report 2026 | View Report |
| Keystone Co Water Quality Report 2026 | View Report |
| Kim Co Water Quality Report 2026 | View Report |
| Kiowa Co Water Quality Report 2026 | View Report |
| Kremmling Co Water Quality Report 2026 | View Report |
| La Jara Co Water Quality Report 2026 | View Report |
| La Junta Co Water Quality Report 2026 | View Report |
| La Porte Co Water Quality Report 2026 | View Report |
| La Veta Co Water Quality Report 2026 | View Report |
| Lafayette Co Water Quality Report 2026 | View Report |
| Lake City Co Water Quality Report 2026 | View Report |
| Lake George Co Water Quality Report 2026 | View Report |
| Lakewood Co Water Quality Report 2026 | View Report |
| Lamar Co Water Quality Report 2026 | View Report |
| Laporte Co Water Quality Report 2026 | View Report |
| Larkspur Co Water Quality Report 2026 | View Report |
| Las Animas Co Water Quality Report 2026 | View Report |
| Las Vegas Co Water Quality Report 2026 | View Report |
| Lasalle Co Water Quality Report 2026 | View Report |
| Leadville Co Water Quality Report 2026 | View Report |
| Leyden Co Water Quality Report 2026 | View Report |
| Limon Co Water Quality Report 2026 | View Report |
| Littleton Co Water Quality Report 2026 | View Report |
| Livermore Co Water Quality Report 2026 | View Report |
| Lochbuie Co Water Quality Report 2026 | View Report |
| Log Lane Village Co Water Quality Report 2026 | View Report |
| Loma Co Water Quality Report 2026 | View Report |
| Longmont Co Water Quality Report 2026 | View Report |
| Los Altos Co Water Quality Report 2026 | View Report |
| Los Angeles Co Water Quality Report 2026 | View Report |
| Louisville Co Water Quality Report 2026 | View Report |
| Loveland Co Water Quality Report 2026 | View Report |
| Lucerne Co Water Quality Report 2026 | View Report |
| Lyons Co Water Quality Report 2026 | View Report |
| Manassa Co Water Quality Report 2026 | View Report |
| Mancos Co Water Quality Report 2026 | View Report |
| Manitou Springs Co Water Quality Report 2026 | View Report |
| Manzanola Co Water Quality Report 2026 | View Report |
| Marble Co Water Quality Report 2026 | View Report |
| Masonville Co Water Quality Report 2026 | View Report |
| Mcclave Co Water Quality Report 2026 | View Report |
| Mead Co Water Quality Report 2026 | View Report |
| Meeker Co Water Quality Report 2026 | View Report |
| Mesa Co Water Quality Report 2026 | View Report |
| Mesa Verde Co Water Quality Report 2026 | View Report |
| Milliken Co Water Quality Report 2026 | View Report |
| Minturn Co Water Quality Report 2026 | View Report |
| Model Co Water Quality Report 2026 | View Report |
| Moffat Co Water Quality Report 2026 | View Report |
| Monte Vista Co Water Quality Report 2026 | View Report |
| Montrose Co Water Quality Report 2026 | View Report |
| Monument Co Water Quality Report 2026 | View Report |
| Morrison Co Water Quality Report 2026 | View Report |
| Morrison Ii Co Water Quality Report 2026 | View Report |
| Mount Crested Butte Co Water Quality Report 2026 | View Report |
| Mountain View Co Water Quality Report 2026 | View Report |
| Nashville Co Water Quality Report 2026 | View Report |
| Nathrop Co Water Quality Report 2026 | View Report |
| Naturita Co Water Quality Report 2026 | View Report |
| Nederland Co Water Quality Report 2026 | View Report |
| New Castle Co Water Quality Report 2026 | View Report |
| New Raymer Co Water Quality Report 2026 | View Report |
| Niwot Co Water Quality Report 2026 | View Report |
| No Real City Co Water Quality Report 2026 | View Report |
| Northglenn Co Water Quality Report 2026 | View Report |
| Norwood Co Water Quality Report 2026 | View Report |
| Nucla Co Water Quality Report 2026 | View Report |
| Oak Creek Co Water Quality Report 2026 | View Report |
| Olathe Co Water Quality Report 2026 | View Report |
| Olney Springs Co Water Quality Report 2026 | View Report |
| Ophir Co Water Quality Report 2026 | View Report |
| Ordway Co Water Quality Report 2026 | View Report |
| Otis Co Water Quality Report 2026 | View Report |
| Ouray Co Water Quality Report 2026 | View Report |
| Ovid Co Water Quality Report 2026 | View Report |
| Pagosa Spgs Co Water Quality Report 2026 | View Report |
| Pagosa Springs Co Water Quality Report 2026 | View Report |
| Palisade Co Water Quality Report 2026 | View Report |
| Palmer Lake Co Water Quality Report 2026 | View Report |
| Paoli Co Water Quality Report 2026 | View Report |
| Paonia Co Water Quality Report 2026 | View Report |
| Parachute Co Water Quality Report 2026 | View Report |
| Paradox Co Water Quality Report 2026 | View Report |
| Parker Co Water Quality Report 2026 | View Report |
| Peetz Co Water Quality Report 2026 | View Report |
| Penrose Co Water Quality Report 2026 | View Report |
| Peterson Afb Co Water Quality Report 2026 | View Report |
| Peyton Co Water Quality Report 2026 | View Report |
| Pierce Co Water Quality Report 2026 | View Report |
| Pine Co Water Quality Report 2026 | View Report |
| Placerville Co Water Quality Report 2026 | View Report |
| Platteville Co Water Quality Report 2026 | View Report |
| Poncha Spgs Co Water Quality Report 2026 | View Report |
| Poncha Springs Co Water Quality Report 2026 | View Report |
| Prairie Village Co Water Quality Report 2026 | View Report |
| Pritchett Co Water Quality Report 2026 | View Report |
| Pueblo Co Water Quality Report 2026 | View Report |
| Pueblo Ii Co Water Quality Report 2026 | View Report |
| Pueblo West Co Water Quality Report 2026 | View Report |
| Ramah Co Water Quality Report 2026 | View Report |
| Rangely Co Water Quality Report 2026 | View Report |
| Red Cliff Co Water Quality Report 2026 | View Report |
| Red Feather Lakes Co Water Quality Report 2026 | View Report |
| Redstone Co Water Quality Report 2026 | View Report |
| Redvale Co Water Quality Report 2026 | View Report |
| Rico Co Water Quality Report 2026 | View Report |
| Ridgway Co Water Quality Report 2026 | View Report |
| Rifle Co Water Quality Report 2026 | View Report |
| Rockvale Co Water Quality Report 2026 | View Report |
| Rocky Ford Co Water Quality Report 2026 | View Report |
| Romeo Co Water Quality Report 2026 | View Report |
| Rye Co Water Quality Report 2026 | View Report |
| Saguache Co Water Quality Report 2026 | View Report |
| Salida Co Water Quality Report 2026 | View Report |
| San Acacio Co Water Quality Report 2026 | View Report |
| San Francisco Co Water Quality Report 2026 | View Report |
| San Luis Co Water Quality Report 2026 | View Report |
| San Marcos Co Water Quality Report 2026 | View Report |
| Sanford Co Water Quality Report 2026 | View Report |
| Santa Ana Co Water Quality Report 2026 | View Report |
| Sedalia Co Water Quality Report 2026 | View Report |
| Sedalia Ii Co Water Quality Report 2026 | View Report |
| Sedgwick Co Water Quality Report 2026 | View Report |
| Seibert Co Water Quality Report 2026 | View Report |
| Seminole Co Water Quality Report 2026 | View Report |
| Sheridan Lake Co Water Quality Report 2026 | View Report |
| Silver Plume Co Water Quality Report 2026 | View Report |
| Silverthorne Co Water Quality Report 2026 | View Report |
| Silverton Co Water Quality Report 2026 | View Report |
| Simi Valley Co Water Quality Report 2026 | View Report |
| Simla Co Water Quality Report 2026 | View Report |
| Slick Rock Co Water Quality Report 2026 | View Report |
| Snowmass Co Water Quality Report 2026 | View Report |
| Snowmass Village Co Water Quality Report 2026 | View Report |
| Somerset Co Water Quality Report 2026 | View Report |
| South Fork Co Water Quality Report 2026 | View Report |
| Springfield Co Water Quality Report 2026 | View Report |
| St Louis Co Water Quality Report 2026 | View Report |
| Steamboat Co Water Quality Report 2026 | View Report |
| Steamboat Spgs Co Water Quality Report 2026 | View Report |
| Steamboat Springs Co Water Quality Report 2026 | View Report |
| Steamboat Vlg Co Water Quality Report 2026 | View Report |
| Sterling Co Water Quality Report 2026 | View Report |
| Sterling Ii Co Water Quality Report 2026 | View Report |
| Stockton Co Water Quality Report 2026 | View Report |
| Strasburg Co Water Quality Report 2026 | View Report |
| Stratton Co Water Quality Report 2026 | View Report |
| Sugar City Co Water Quality Report 2026 | View Report |
| Superior Co Water Quality Report 2026 | View Report |
| Superior Ii Co Water Quality Report 2026 | View Report |
| Swink Co Water Quality Report 2026 | View Report |
| Tabernash Co Water Quality Report 2026 | View Report |
| Telluride Co Water Quality Report 2026 | View Report |
| Tempe Co Water Quality Report 2026 | View Report |
| Thornton Co Water Quality Report 2026 | View Report |
| Timnath Co Water Quality Report 2026 | View Report |
| Towaoc Co Water Quality Report 2026 | View Report |
| Trinidad Co Water Quality Report 2026 | View Report |
| Tustin Co Water Quality Report 2026 | View Report |
| Two Buttes Co Water Quality Report 2026 | View Report |
| Usaf Academy Co Water Quality Report 2026 | View Report |
| Vail Co Water Quality Report 2026 | View Report |
| Vancouver Co Water Quality Report 2026 | View Report |
| Victor Co Water Quality Report 2026 | View Report |
| Vilas Co Water Quality Report 2026 | View Report |
| Villa Grove Co Water Quality Report 2026 | View Report |
| Vona Co Water Quality Report 2026 | View Report |
| Walden Co Water Quality Report 2026 | View Report |
| Walsenberg Ii Co Water Quality Report 2026 | View Report |
| Walsenburg Co Water Quality Report 2026 | View Report |
| Walsh Co Water Quality Report 2026 | View Report |
| Ward Co Water Quality Report 2026 | View Report |
| Watkins Co Water Quality Report 2026 | View Report |
| Weldona Co Water Quality Report 2026 | View Report |
| Wellington Co Water Quality Report 2026 | View Report |
| Westcliffe Co Water Quality Report 2026 | View Report |
| Westcreek Co Water Quality Report 2026 | View Report |
| Westminster Co Water Quality Report 2026 | View Report |
| Wetmore Co Water Quality Report 2026 | View Report |
| Wheat Ridge Co Water Quality Report 2026 | View Report |
| White Plains Co Water Quality Report 2026 | View Report |
| Whitewater Co Water Quality Report 2026 | View Report |
| Wiggins Co Water Quality Report 2026 | View Report |
| Wiley Co Water Quality Report 2026 | View Report |
| Williamsburg Co Water Quality Report 2026 | View Report |
| Windsor Co Water Quality Report 2026 | View Report |
| Winter Park Co Water Quality Report 2026 | View Report |
| Wolcott Co Water Quality Report 2026 | View Report |
| Woodland Co Water Quality Report 2026 | View Report |
| Woodland Park Co Water Quality Report 2026 | View Report |
| Woody Creek Co Water Quality Report 2026 | View Report |
| Wray Co Water Quality Report 2026 | View Report |
| X Co Water Quality Report 2026 | View Report |
| Yampa Co Water Quality Report 2026 | View Report |
| York Co Water Quality Report 2026 | View Report |
| Yuma Co Water Quality Report 2026 | View Report |
What Does This Mean For You?
Detecting Nitrates in your water supply does not necessarily mean immediate danger, but long-term exposure -- even at low levels -- carries measurable health risk. Reverse osmosis is the most effective method for removing nitrates from drinking water.
Our recommendation: View Nitrates filters certified for Colorado water conditions or take our free Water Finder Quiz to get a personalized recommendation.
Filter Nitrates From Your Colorado Tap Water
PureWaterGuys carries NSF-certified filters proven to reduce Nitrates and other contaminants found in Colorado water.
Shop Nitrates Filters Take the Water QuizFrequently Asked Questions
What is Nitrates?
High nitrate levels cause methemoglobinemia (blue baby syndrome) in infants. EPA MCL is 10 mg/L.
Is Colorado tap water safe to drink?
Water quality varies by city. Of the Colorado systems we analyzed, 390 detected Nitrates. Most levels are below EPA action thresholds, but long-term low-level exposure carries health risk. Check your city's report above or use a certified home filter as a precaution.
What filter removes Nitrates from tap water?
Reverse osmosis is the most effective method for removing nitrates from drinking water. See our Nitrates filter options.
Data sourced from EPA-mandated annual water quality reports (Consumer Confidence Reports). Last updated: 2026. Not all systems are required to test for every contaminant.