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Tap water quality report

Alamosa, CO

EPA monitoring detected 15 contaminants across the 1 water supplier serving Alamosa. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
11,271
people served
15
contaminants found
Colorado rankings Lead in Colorado PFAS in Colorado

What was found in Alamosa's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
1400 µg/L 35%
of the EPA limit 4000 µg/L
 1/1 SYR4
Nitrate
78 µg/L 0.8%
of the EPA limit 10000 µg/L
 1/1 SYR4
Nitrate-Nitrite
47 µg/L 0.5%
of the EPA limit 10000 µg/L
 1/1 SYR4
Barium
19 µg/L 1%
of the EPA limit 2000 µg/L
 1/1 SYR4
Lithium
15.8 µg/L
No EPA limit set
 1/1 UCMR-5
Arsenic
9.3 µg/L 93%
of the EPA limit 10 µg/L
 1/1 SYR4
Monochloroacetic Acid
8.4 µg/L
No EPA limit set
 1/1 SYR4
Total Haloacetic Acids (HAA5)
8.4 µg/L 14%
of the EPA limit 60 µg/L
 1/1 SYR4
TTHM
7.8 µg/L 9.8%
of the EPA limit 80 µg/L
 1/1 SYR4
Chloroform
3.6 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
3.2 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
1.6 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
1.1 µg/L
No EPA limit set
 1/1 SYR4
Antimony, Total
0.5000 µg/L 8.3%
of the EPA limit 6 µg/L
 1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 1/1 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 single worst sample on record — 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 Alamosa

SupplierPopulation served
ALAMOSA CITY OF 11,271

Frequently asked questions about Alamosa tap water

Is Alamosa tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Alamosa. 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 Alamosa?

1 public water supplier report drinking-water monitoring for Alamosa, Colorado to the EPA. Each is listed above with its population served.

What contaminants are in Alamosa's water?

The contaminants EPA monitoring detected in Alamosa include Fluoride, Nitrate, Nitrate-Nitrite, Barium, Lithium. The full list, with the highest level found 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.