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Tap water quality report

Tohatchi, NM

EPA monitoring detected 14 contaminants across the 2 water suppliers serving Tohatchi. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
588
people served
14
contaminants found
New Mexico rankings Lead in New Mexico PFAS in New Mexico

What was found in Tohatchi's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
1325 µg/L 33%
of the EPA limit 4000 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
2/2 SYR4
Nitrite
390 µg/L 39%
of the EPA limit 1000 µg/L
Highest in the city: Tohatchi Public School · 240 people · 2018
1/2 SYR4
Nitrate
230 µg/L 2.3%
of the EPA limit 10000 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
1/2 SYR4
Barium
135 µg/L 6.8%
of the EPA limit 2000 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
2/2 SYR4
Cyanide
29.7 µg/L 15%
of the EPA limit 200 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
1/2 SYR4
TTHM
5.714 µg/L 7.1%
of the EPA limit 80 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
Highest in the city: 6.4795 µg/L — Tohatchi Public School · 240 people · 2018
2/2 SYR4
Gross Alpha, Excl. Radon And U
2.437 pCi/L 16%
of the EPA limit 15 pCi/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2015
1/2 SYR4
Selenium
2.065 µg/L 4.1%
of the EPA limit 50 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
1/2 SYR4
Arsenic
1.88 µg/L 19%
of the EPA limit 10 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
1/2 SYR4
Total Haloacetic Acids (HAA5)
1.54 µg/L 2.6%
of the EPA limit 60 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
1/2 SYR4
Combined Radium (-226 And -228)
1.17 pCi/L 23%
of the EPA limit 5 pCi/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2015
1/2 SYR4
Di(2-ethylhexyl) Phthalate
0.7000 µg/L 12%
of the EPA limit 6 µg/L
Highest in the city: Tohatchi Public School · 240 people · 2017
1/2 SYR4
Lead
0.0131 mg/L 87%
of the EPA limit 0.0150 mg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2025
2/2 LCR
2,3,7,8-TCDD
0.000012 µg/L 39%
of the EPA limit 0.000030 µg/L
Main supplier: Chuska Community Boarding School BIA · 348 people · 2018
2/2 SYR4
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Tohatchi

SupplierPopulation served
Chuska Community Boarding School BIA 348
Tohatchi Public School 240

Frequently asked questions about Tohatchi tap water

Is Tohatchi tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Tohatchi. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Tohatchi?

2 public water suppliers report drinking-water monitoring for Tohatchi, New Mexico to the EPA. Each is listed above with its population served.

What contaminants are in Tohatchi's water?

The contaminants EPA monitoring detected in Tohatchi include Fluoride, Nitrite, Nitrate, Barium, Cyanide. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.