What was found in Laramie'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 2170 µg/L 22% of the EPA limit 10000 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 3092.5 µg/L — CV LARAMIE MHP, LLC · 375 people · 2019 | 3/8 | SYR4 |
| Nitrate | 2200 µg/L 22% of the EPA limit 10000 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 1/8 | SYR4 |
| Fluoride | 700 µg/L 18% of the EPA limit 4000 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 3/8 | SYR4 |
| Barium | 300 µg/L 15% of the EPA limit 2000 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 600 µg/L — CV LARAMIE MHP, LLC · 375 people · 2019 | 2/8 | SYR4 |
| Copper | 183.9 µg/L 14% of the EPA limit 1300 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2018
Highest in the city: 391.8 µg/L — SUNNY MEADOWS VILLAGE · 485 people · 2017 | 8/8 | SYR4 |
| TTHM | 42.54 µg/L 53% of the EPA limit 80 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 62.2 µg/L — SOUTH LARAMIE W&S DISTRICT · 490 people · 2019 | 6/8 | SYR4 |
| Chloroform | 36 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 52.62 µg/L — SOUTH LARAMIE W&S DISTRICT · 490 people · 2019 | 6/8 | SYR4 |
| Chromium | 50 µg/L 50% of the EPA limit 100 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 1/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 42.675 µg/L 71% of the EPA limit 60 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 6/8 | SYR4 |
| Dichloroacetic Acid | 16.65 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 23.25 µg/L — SOUTH LARAMIE W&S DISTRICT · 490 people · 2019 | 6/8 | SYR4 |
| Trichloroacetic Acid | 18.5 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 19 µg/L — SOUTH LARAMIE W&S DISTRICT · 490 people · 2019 | 6/8 | SYR4 |
| Lead | 14 µg/L 93% of the EPA limit 15 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2018
Highest in the city: 15 µg/L — BREAZEALE'S MOBILE HOME PARK · 345 people · 2018 | 7/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.89 pCi/L 26% of the EPA limit 15 pCi/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2014
Highest in the city: 10.5 pCi/L — ANTELOPE RIDGE HOA · 70 people · 2019 | 3/8 | SYR4 |
| Bromodichloromethane | 7.311 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 8.34 µg/L — SOUTH LARAMIE W&S DISTRICT · 490 people · 2019 | 6/8 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019
Highest in the city: 5.9 µg/L — ANTELOPE RIDGE HOA · 70 people · 2019 | 3/8 | SYR4 |
| Bromate | 5.345 µg/L 53% of the EPA limit 10 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2018 | 1/8 | SYR4 |
| Dibromochloromethane | 4.985 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 6/8 | SYR4 |
| Combined Radium (-226 And -228) | 3.86 pCi/L 77% of the EPA limit 5 pCi/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2014 | 3/8 | SYR4 |
| Combined Uranium | 1.38 µg/L 4.6% of the EPA limit 30 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2014
Highest in the city: 2.4 µg/L — ANTELOPE RIDGE HOA · 70 people · 2019 | 3/8 | SYR4 |
| Bromoform | 2.12 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 3/8 | SYR4 |
| Selenium | 1.9 µg/L 3.8% of the EPA limit 50 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 3/8 | SYR4 |
| Monochloroacetic Acid | 1.8 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 6/8 | SYR4 |
| Dibromoacetic Acid | 1.71 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 5/8 | SYR4 |
| Monobromoacetic Acid | 0.9545 µg/L No EPA limit set Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 2/8 | SYR4 |
| Thallium, Total | 0.8000 µg/L 40% of the EPA limit 2 µg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2019 | 1/8 | SYR4 |
| Lead | 0.0013 mg/L 8.5% of the EPA limit 0.0150 mg/L Main supplier: LARAMIE, CITY OF · 32,395 people · 2024
Highest in the city: 0.0050 mg/L — SOUTH LARAMIE W&S DISTRICT · 490 people · 2023 | 8/8 | 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 Laramie
| Supplier | Population served |
|---|---|
| LARAMIE, CITY OF | 32,395 |
| SOUTH LARAMIE W&S DISTRICT | 490 |
| SUNNY MEADOWS VILLAGE | 485 |
| CV LARAMIE MHP, LLC | 375 |
| BREAZEALE'S MOBILE HOME PARK | 345 |
| NINE-MILE WATER & SEWER DISTRICT | 200 |
| SEVEN MILE WATER & SEWER DISTRICT | 130 |
| ANTELOPE RIDGE HOA | 70 |
Frequently asked questions about Laramie tap water
Is Laramie tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Laramie. 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 Laramie?
8 public water suppliers report drinking-water monitoring for Laramie, Wyoming to the EPA. Each is listed above with its population served.
What contaminants are in Laramie's water?
The contaminants EPA monitoring detected in Laramie include Nitrate-Nitrite, Nitrate, Fluoride, Barium, Copper. 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.