Water Quality in Ft Defiance, AZ (86504)
EPA violation data for public water systems serving ZIP code 86504.
Active Health Violations
51 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 98% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
5,760
Population
128
Water Systems
154
Violations (5yr)
51
Health-Based
Location
Loading map...
Water Systems Serving This Area (128)
Bluewater Lake State Park
Groundwater 100,000 people served
0 violations
Farmington Rural-Shiprock-Beclabito Ntua
Purchased surface water 15,233 people served
2 violations (5yr)
Lead tested: 2.5 ppb (limit: 15 ppb) ✓
Fort Defiance-Window Rock-St Michaels Ntua
1 health-based Groundwater 12,869 people served
2 violations (5yr)
· 1 health-based
Lead tested: 1.6 ppb (limit: 15 ppb) ✓
Shiprock-Rattlesnake-Cudei-Beclabito Ntua
Surface water 9,975 people served
0 violations
Chinle-Many Farms-Del Muerto Ntua
Groundwater 8,458 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Tuba City Community - Ntua
Groundwater 6,732 people served
0 violations
Tuba City Ntua
Groundwater 6,276 people served
0 violations
Pinon-District 4 Ntua
Groundwater 5,195 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Dilkon-Indian Wells-Greasewood-White Cone Ntua
3 health-based Groundwater 4,986 people served
6 violations (5yr)
· 3 health-based · All resolved
Mariano Lake-Pinedale-Church Rock Ntua
Groundwater 4,562 people served
0 violations
Crownpoint-Littlewater-Three Mile Point Ntua
Groundwater 3,950 people served
0 violations
Ganado-Burnside-Cornfield-Steamboat Ntua
Groundwater 3,947 people served
3 violations (5yr)
Lead tested: 2 ppb (limit: 15 ppb) ✓
Kayenta Ntua
All resolved Groundwater 3,844 people served
2 violations (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Leupp-Birdsprings-Tolani Lake Ntua
Groundwater 2,100 people served
0 violations
Bread Springs-Chichiltah Ntua
Groundwater 2,066 people served
0 violations
Sweetwater Ntua
5 health-based Purchased surface water 2,014 people served
9 violations (5yr)
· 5 health-based
Lead tested: 1 ppb (limit: 15 ppb) ✓
Sanostee-Tocito Ntua
Groundwater 1,953 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Torreon-Ojo Encino East - Ntua
Purchased surface water 1,951 people served
0 violations
Lead tested: 2.5 ppb (limit: 15 ppb) ✓
New Lands Ntua
Groundwater 1,905 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Twin Lakes Ntua
Groundwater 1,833 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Tohatchi-Mexican Springs-Twin Lakes Ntua
Groundwater 1,669 people served
0 violations
Lead tested: 2.5 ppb (limit: 15 ppb) ✓
Lukachukai Ntua
Groundwater 1,659 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Defiance Ntua
Groundwater 1,659 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Red Rock Ntua
Groundwater 1,652 people served
0 violations
Thoreau West-John Willie Camp-Baca Ntua
Groundwater 1,611 people served
0 violations
Kaibeto Ntua
All resolved Groundwater 1,590 people served
1 violation (5yr)
· All resolved
Rock Springs Community - Ntua
Groundwater 1,574 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Aneth Ntua
12 health-based Groundwater 1,481 people served
17 violations (5yr)
· 12 health-based · All resolved
Lead tested: 2 ppb (limit: 15 ppb) ✓
Inscription House-Navajo Mountain Ntua
Groundwater 1,368 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Cottonwood-Tselani Ntua
Purchased groundwater 1,334 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Oljato Ntua
Groundwater 1,276 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Chilchinbeto Ntua
All resolved Groundwater 1,276 people served
2 violations (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Tsaile-Dine College Ntua
Groundwater 1,190 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Naschitti-Bisola Ntua
Groundwater 1,173 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Gap / Cedar Ridge - Ntua
Groundwater 1,148 people served
0 violations
Shonto Junction Ntua
Groundwater 1,146 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Tonalea-Red Lake Ntua
Groundwater 1,146 people served
0 violations
Carson-Huerfano Ntua
Purchased surface water 1,142 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Gap-Cedar Ridge Ntua
Groundwater 1,125 people served
0 violations
Lechee Ntua
Purchased surface water 1,115 people served
0 violations
Ojo Encino North Ntua
Purchased surface water 1,108 people served
0 violations
Jeddito Ntua
Groundwater 1,105 people served
0 violations
Dennehotso Ntua
Groundwater 1,040 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Rock Point Ntua
All resolved Groundwater 1,029 people served
2 violations (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Red Mesa Ntua
4 health-based Purchased surface water 1,023 people served
9 violations (5yr)
· 4 health-based
Lead tested: 1 ppb (limit: 15 ppb) ✓
Houck-Querino Canyon Ntua
Groundwater 1,023 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Hard Rock Ntua
Groundwater 982 people served
0 violations
Klagetoh Ntua
Groundwater 971 people served
0 violations
Casamero Lake-Smith Lake Ntua
Groundwater 906 people served
0 violations
Toadlena Ntua
18 health-based Groundwater 903 people served
25 violations (5yr)
· 18 health-based
Lead tested: 1 ppb (limit: 15 ppb) ✓
Round Rock Ntua
Groundwater 876 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Tsehootsooi Middle School
Purchased groundwater 875 people served
34 violations (5yr)
Lead tested: 1 ppb (limit: 15 ppb) ✓
Tsa Yah Toh Ntua
Groundwater 865 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Nazlini Ntua
Groundwater 862 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Narbona Pass Ntua
Groundwater 862 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Sawmill Ntua
All resolved Groundwater 838 people served
1 violation (5yr)
· All resolved
Lead tested: 1.3 ppb (limit: 15 ppb) ✓ Copper tested: 1900 ppb (limit: 1300 ppb)
Iyanbito Ntua
Groundwater 797 people served
0 violations
Cameron Community - Ntua
Groundwater 795 people served
0 violations
Kinlichee Ntua
Groundwater 787 people served
0 violations
Lead tested: 4 ppb (limit: 15 ppb) ✓
Lupton Ntua
Groundwater 783 people served
0 violations
Nageezi Ntua
All resolved Purchased surface water 763 people served
2 violations (5yr)
· All resolved
Lead tested: 2.5 ppb (limit: 15 ppb) ✓
Red Valley North Ntua
Groundwater 756 people served
0 violations
Lead tested: 2.5 ppb (limit: 15 ppb) ✓
Teec Nos Pos Ntua
Purchased surface water 752 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Cameron Ntua
Groundwater 742 people served
1 violation (5yr)
Lead tested: 2.5 ppb (limit: 15 ppb) ✓
Standing Rock Ntua
All resolved Groundwater 739 people served
1 violation (5yr)
· All resolved
Cove Ntua
Groundwater 728 people served
0 violations
Lead tested: 1.1 ppb (limit: 15 ppb) ✓
Crystal Ntua
Groundwater 715 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Coyote Canyon-Bass Lake Ntua
Groundwater 622 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Newcomb Ntua
Groundwater 602 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Dalton Pass Chap.-O&M
Unknown 587 people served
0 violations
Aneth Community
Groundwater 500 people served
0 violations
White Mesa Ntua
Groundwater 496 people served
1 violation (5yr)
White Rock-Lake Valley Ntua
All resolved Groundwater 492 people served
1 violation (5yr)
· All resolved
Dzilth-Na-O-Dith-Hle Ntua
Purchased surface water 462 people served
0 violations
Lead tested: 2.1 ppb (limit: 15 ppb) ✓
Mexican Spring Comm. Ntua
Unknown 460 people served
0 violations
Rough Rock Ntua
Groundwater 455 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Montezuma Creek Ntua
All resolved Groundwater 424 people served
3 violations (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Kitsillie-Black Mesa Ntua
Groundwater 414 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Buffalo Springs Ntua
Groundwater 397 people served
0 violations
Lead tested: 2.8 ppb (limit: 15 ppb) ✓
Shonto Ntua
Groundwater 397 people served
0 violations
Lead tested: 1.1 ppb (limit: 15 ppb) ✓
Coal Mine Mesa Ntua
Groundwater 393 people served
0 violations
Oak Springs Ntua (South Of Hunters Point)
Groundwater 390 people served
0 violations
Lead tested: 1.9 ppb (limit: 15 ppb) ✓
White Mesa - Ntua
Groundwater 376 people served
0 violations
Baca-Haystack Ntua
Groundwater 376 people served
0 violations
Mittenrock Ntua
Groundwater 352 people served
0 violations
Lead tested: 2.5 ppb (limit: 15 ppb) ✓
Coppermine Ntua
All resolved Groundwater 342 people served
1 violation (5yr)
· All resolved
Coal Mine Mesa - Ntua
Groundwater 334 people served
0 violations
Wheatfields Ntua
All resolved Groundwater 321 people served
2 violations (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Todahaidekani Ntua
All resolved Purchased surface water 301 people served
1 violation (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Mexican Water Ntua
8 health-based Purchased surface water 294 people served
17 violations (5yr)
· 8 health-based
Lead tested: 1 ppb (limit: 15 ppb) ✓
Long House Valley Ntua
Groundwater 277 people served
0 violations
Lead tested: 1.1 ppb (limit: 15 ppb) ✓
Whitehorse Lake Ntua
Purchased surface water 277 people served
0 violations
Lead tested: 5.2 ppb (limit: 15 ppb) ✓
Sheepsprings South-Ntua
Unknown 270 people served
0 violations
Baca Community - Ntua
Unknown 265 people served
0 violations
Mexican Springs West Rural Ntua
Groundwater 257 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Rainbow Village-Navajo Mountain Ntua
Surface water 255 people served
0 violations
Mexican Hat Ntua
Groundwater 239 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Forest Lake Ntua
Groundwater 233 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Pine Springs Ntua
Groundwater 222 people served
0 violations
Lead tested: 1.4 ppb (limit: 15 ppb) ✓
Casa Del Eco Mesa Ntua
Groundwater 211 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
White Post Mission Ntua
Groundwater 185 people served
0 violations
Lead tested: 2.1 ppb (limit: 15 ppb) ✓
Littlewater-Ntua
Unknown 160 people served
0 violations
Keyah 1 Napi Ntua
Groundwater 133 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Red Mesa Comm, Ntua
Unknown 120 people served
0 violations
Bass Lake Om
Groundwater 100 people served
0 violations
Baca Prewitt Watering Point
Groundwater 100 people served
0 violations
Van Zee Comm.-O&M (Su87)
Surface water 100 people served
0 violations
Red Rock - O&M
Unknown 100 people served
0 violations
Lupton South - Ntua
Unknown 94 people served
0 violations
Rare Metals - Ntua
Groundwater 81 people served
0 violations
Rare Metals Ntua
Groundwater 72 people served
0 violations
Crystal/Yazzie Spring - O&M
Unknown 72 people served
0 violations
Manuelito Chapter House Om
Groundwater 66 people served
0 violations
Moenave Community
Groundwater 65 people served
8 violations (5yr)
Lead tested: 1 ppb (limit: 15 ppb) ✓
Cane Valley Ntua
Groundwater 58 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Casamero Cup Ntua
Groundwater 48 people served
0 violations
Burnham Om
Groundwater 48 people served
0 violations
Boardman Loop Ntua
All resolved Purchased groundwater 48 people served
1 violation (5yr)
· All resolved
Montezuma Creek Ashcroft
Groundwater 45 people served
0 violations
Baby Rocks Ntua
Groundwater 44 people served
0 violations
Lead tested: 2.2 ppb (limit: 15 ppb) ✓
Kaibeto Chapter - O&M
Unknown 30 people served
0 violations
Coalmine Chapter
Unknown 30 people served
0 violations
Whitehorse Lake Chapter - O&M
Unknown 30 people served
0 violations
Becenti Chapter - O&M
Unknown 25 people served
0 violations
Coppermine Chapter - O&M
Unknown 25 people served
0 violations
Tohatchi Area Of Opportunity And Services Inc Bia
Groundwater 25 people served
0 violations
Twin Arrows Ntua
Groundwater 25 people served
0 violations
Teec Nos Pos Helium Plant Community Om
Groundwater 25 people served
0 violations
Contaminants Found
ArsenicHealth-Based
A naturally occurring element that can cause cancer and other health effects at high levels.
60 violations
All resolved
Revised Total Coliform RuleHealth-Based
Missed testing deadlines — not a detection of bacteria.
36 violations
Has active
TTHMHealth-Based
3 violations
All resolved
Public NoticeMonitoring
34 violations
Has active
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
6 violations
Has active
Consumer Confidence RuleMonitoring
Annual water quality report delivery requirement.
6 violations
All resolved
NitrateMonitoring
At high levels, nitrate can cause blue baby syndrome in infants.
3 violations
All resolved
NitriteMonitoring
Similar to nitrate — harmful to infants at high levels.
3 violations
All resolved
E. COLIMonitoring
2 violations
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit1 ppb measured
Action level: 15 ppb
Sampled: Jan 2025
Copper (Cu)
Exceeds limit1900 ppb measured
Action level: 1300 ppb
Sampled: Jan 2022
How Does This Compare?
Ft Defiance (86504) has more violations than 98% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 154.
Fewer violations 98th percentile More violations
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.