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Tap water quality report

South Fork, CO

EPA monitoring detected 21 contaminants across the 4 water suppliers serving South Fork. 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.

4
water suppliers
1,152
people served
21
contaminants found
Colorado rankings Lead in Colorado PFAS in Colorado

What was found in South Fork'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
Nitrate
3179.5 µg/L 32%
of the EPA limit 10000 µg/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
3/4 SYR4
Nitrate-Nitrite
3000 µg/L 30%
of the EPA limit 10000 µg/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2013
2/4 SYR4
Xylenes, Total
1520.1 µg/L 15%
of the EPA limit 10000 µg/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
1/4 SYR4
Fluoride
197.5 µg/L 4.9%
of the EPA limit 4000 µg/L
Highest in the city: INDIAN TRAILS WATER LLC · 110 people · 2018
2/4 SYR4
Barium
172.2 µg/L 8.6%
of the EPA limit 2000 µg/L
Highest in the city: INDIAN TRAILS WATER LLC · 110 people · 2018
1/4 SYR4
TTHM
23.38 µg/L 29%
of the EPA limit 80 µg/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
2/4 SYR4
Bromoform
19.13 µg/L
No EPA limit set
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
1/4 SYR4
Dibromochloromethane
6.39 µg/L
No EPA limit set
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
2/4 SYR4
Total Haloacetic Acids (HAA5)
4.44 µg/L 7.4%
of the EPA limit 60 µg/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
2/4 SYR4
Gross Alpha, Excl. Radon And U
4.1 pCi/L 27%
of the EPA limit 15 pCi/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2014
2/4 SYR4
Dibromoacetic Acid
3.57 µg/L
No EPA limit set
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
1/4 SYR4
Bromodichloromethane
2.57 µg/L
No EPA limit set
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
2/4 SYR4
Arsenic
1.9 µg/L 19%
of the EPA limit 10 µg/L
Highest in the city: INDIAN TRAILS WATER LLC · 110 people · 2018
1/4 SYR4
Monobromoacetic Acid
1.2 µg/L
No EPA limit set
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
1/4 SYR4
Dichloroacetic Acid
1.1 µg/L
No EPA limit set
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
1/4 SYR4
Chloroform
0.9800 µg/L
No EPA limit set
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2019
2/4 SYR4
Combined Uranium
0.7000 µg/L 2.3%
of the EPA limit 30 µg/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2014
1/4 SYR4
Mercury
0.6000 µg/L 30%
of the EPA limit 2 µg/L
Highest in the city: INDIAN TRAILS WATER LLC · 110 people · 2018
1/4 SYR4
Cadmium
0.3000 µg/L 6%
of the EPA limit 5 µg/L
Highest in the city: INDIAN TRAILS WATER LLC · 110 people · 2018
1/4 SYR4
Combined Radium (-226 And -228)
0.2000 pCi/L 4%
of the EPA limit 5 pCi/L
Highest in the city: RIO GRANDE WATER COMPANY · 265 people · 2013
1/4 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: SOUTH FORK WEST MUNICIPAL TOWN OF · 566 people · 2025
Highest in the city: 0.0030 mg/L — RIO GRANDE WATER COMPANY · 265 people · 2025
4/4 LCR
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 South Fork

SupplierPopulation served
SOUTH FORK WEST MUNICIPAL TOWN OF 566
RIO GRANDE WATER COMPANY 265
RIVIERE ESTATES 211
INDIAN TRAILS WATER LLC 110

Frequently asked questions about South Fork tap water

Is South Fork tap water safe to drink?

EPA testing detected 21 contaminants in the water serving South Fork. 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 South Fork?

4 public water suppliers report drinking-water monitoring for South Fork, Colorado to the EPA. Each is listed above with its population served.

What contaminants are in South Fork's water?

The contaminants EPA monitoring detected in South Fork include Nitrate, Nitrate-Nitrite, Xylenes, Total, Fluoride, Barium. 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.