What was found in ZIP 81637
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 433.5 µg/L 4.3% of the EPA limit 10000 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 540 µg/L — TWO RIVERS VILLAGE · 896 people · 2019 | 2/2 | SYR4 |
| Fluoride | 108.55 µg/L 2.7% of the EPA limit 4000 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 269 µg/L — TWO RIVERS VILLAGE · 896 people · 2017 | 2/2 | SYR4 |
| Nitrate-Nitrite | 213 µg/L 2.1% of the EPA limit 10000 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 2/2 | SYR4 |
| Barium | 62.95 µg/L 3.1% of the EPA limit 2000 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 78.35 µg/L — TWO RIVERS VILLAGE · 896 people · 2017 | 2/2 | SYR4 |
| TTHM | 18.46 µg/L 23% of the EPA limit 80 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 43.11 µg/L — TWO RIVERS VILLAGE · 896 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 5.11 µg/L 8.5% of the EPA limit 60 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 21.999 µg/L — TWO RIVERS VILLAGE · 896 people · 2019 | 2/2 | SYR4 |
| Lithium | 12 µg/L No EPA limit set Highest in the ZIP: TWO RIVERS VILLAGE · 896 people · 2024 | 1/2 | UCMR-5 |
| Chloroform | 8.695 µg/L No EPA limit set Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 11.9 µg/L — TWO RIVERS VILLAGE · 896 people · 2012 | 2/2 | SYR4 |
| Bromodichloromethane | 3.215 µg/L No EPA limit set Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 8.6 µg/L — TWO RIVERS VILLAGE · 896 people · 2012 | 2/2 | SYR4 |
| Dibromochloromethane | 1.16 µg/L No EPA limit set Main supplier: GYPSUM TOWN OF · 15,272 people · 2019
Highest in the ZIP: 4.6 µg/L — TWO RIVERS VILLAGE · 896 people · 2012 | 2/2 | SYR4 |
| Dichloroacetic Acid | 3.08 µg/L No EPA limit set Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 2.8 µg/L No EPA limit set Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.3965 pCi/L 16% of the EPA limit 15 pCi/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 1/2 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 1.76 µg/L 5.9% of the EPA limit 30 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 2/2 | SYR4 |
| Bromoform | 1.3 µg/L No EPA limit set Highest in the ZIP: TWO RIVERS VILLAGE · 896 people · 2012 | 1/2 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.6800 pCi/L 14% of the EPA limit 5 pCi/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 2/2 | SYR4 |
| Xylenes, Total | 0.6400 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: TWO RIVERS VILLAGE · 896 people · 2017 | 1/2 | SYR4 |
| Simazine | 0.4200 µg/L 11% of the EPA limit 4 µg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: GYPSUM TOWN OF · 15,272 people · 2025 | 2/2 | 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.
Water suppliers serving ZIP 81637
| Supplier | State | Population served |
|---|---|---|
| GYPSUM TOWN OF | CO | 15,272 |
| TWO RIVERS VILLAGE | CO | 896 |
Frequently asked questions about ZIP 81637 tap water
Is the tap water in ZIP 81637 safe to drink?
EPA testing detected 21 contaminants across the water suppliers serving ZIP 81637. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 81637?
2 public water suppliers report EPA drinking-water monitoring for ZIP 81637. Each is listed above with its population served.
What contaminants are in ZIP 81637's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.