What was found in Brighton'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 | 6500 µg/L 65% of the EPA limit 10000 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019 | 3/7 | SYR4 |
| Nitrate-Nitrite | 4050 µg/L 41% of the EPA limit 10000 µg/L Highest in the city: TODD CREEK VILLAGE MD · 7,363 people · 2019 | 1/7 | SYR4 |
| Fluoride | 1042.5 µg/L 26% of the EPA limit 4000 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 2628 µg/L — MOUNTAIN VIEW WUA · 320 people · 2017 | 7/7 | SYR4 |
| Ethylbenzene | 420.52 µg/L 60% of the EPA limit 700 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019 | 3/7 | SYR4 |
| TTHM | 93.2 µg/L 117% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 111.125 µg/L — HOPE DITCH CO · 63 people · 2019 | 7/7 | SYR4 |
| Bromoform | 14.2 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 95.6 µg/L — HOPE DITCH CO · 63 people · 2019 | 7/7 | SYR4 |
| Barium | 32 µg/L 1.6% of the EPA limit 2000 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 92.6 µg/L — TODD CREEK VILLAGE MD · 7,363 people · 2019 | 7/7 | SYR4 |
| Total Haloacetic Acids (HAA5) | 34.325 µg/L 57% of the EPA limit 60 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019 | 7/7 | SYR4 |
| Lithium | 31.9 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025 | 2/7 | UCMR-5 |
| Bromodichloromethane | 31.4 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019 | 6/7 | SYR4 |
| Dibromochloromethane | 28 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 31.04 µg/L — TODD CREEK VILLAGE MD · 7,363 people · 2019 | 7/7 | SYR4 |
| Chloroform | 27.55 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019 | 5/7 | SYR4 |
| Xylenes, Total | 5.185 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 15.2 µg/L — THIRD CREEK WUA · 90 people · 2019 | 3/7 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 14.3 µg/L 238% of the EPA limit, at the 95th percentile of samples — 6 µg/L Highest in the city: HI LAND ACRES WSD · 350 people · 2019 | 2/7 | SYR4 |
| Dichloroacetic Acid | 13.7 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019 | 4/7 | SYR4 |
| Dibromoacetic Acid | 8.5035 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 10.14 µg/L — TODD CREEK VILLAGE MD · 7,363 people · 2019 | 7/7 | SYR4 |
| Trichloroacetic Acid | 8.483 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019 | 4/7 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 6.85 µg/L — HOPE DITCH CO · 63 people · 2017 | 6/7 | SYR4 |
| Combined Uranium | 3.385 µg/L 11% of the EPA limit 30 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2016
Highest in the city: 6.85 µg/L — TODD CREEK VILLAGE MD · 7,363 people · 2019 | 2/7 | SYR4 |
| Monochloroacetic Acid | 2.6095 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 5.2 µg/L — NORTH WASHINGTON WUA · 90 people · 2019 | 3/7 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.8659 pCi/L 32% of the EPA limit 15 pCi/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2016
Highest in the city: 5 pCi/L — NORTH WASHINGTON WUA · 90 people · 2019 | 6/7 | SYR4 |
| Selenium | 2.15 µg/L 4.3% of the EPA limit 50 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 4.6 µg/L — TODD CREEK VILLAGE MD · 7,363 people · 2019 | 7/7 | SYR4 |
| Arsenic | 1.8 µg/L 18% of the EPA limit 10 µg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 3.8 µg/L — HOPE DITCH CO · 63 people · 2017 | 7/7 | SYR4 |
| Gross Beta Particle Activity | 3.7 pCi/L No EPA limit set Highest in the city: TODD CREEK VILLAGE MD · 7,363 people · 2013 | 1/7 | SYR4 |
| Monobromoacetic Acid | 3.064 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2019
Highest in the city: 3.08 µg/L — TODD CREEK VILLAGE MD · 7,363 people · 2019 | 4/7 | SYR4 |
| Combined Radium (-226 And -228) | 0.1950 pCi/L 3.9% of the EPA limit 5 pCi/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2013
Highest in the city: 1.7 pCi/L — TODD CREEK VILLAGE MD · 7,363 people · 2019 | 5/7 | SYR4 |
| Antimony, Total | 1 µg/L 17% of the EPA limit 6 µg/L Highest in the city: TODD CREEK VILLAGE MD · 7,363 people · 2019 | 1/7 | SYR4 |
| PFBS | 0.0074 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025
Highest in the city: 0.0380 µg/L — TODD CREEK VILLAGE MD · 7,363 people · 2023 | 2/7 | UCMR-5 |
| Pfpea | 0.0193 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025 | 2/7 | UCMR-5 |
| Pfba | 0.0106 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025 | 2/7 | UCMR-5 |
| PFOS | 0.0106 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025 | 2/7 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: BRIGHTON CITY OF · 56,304 people · 2023
Highest in the city: 0.0096 mg/L — MOUNTAIN VIEW WUA · 320 people · 2025 | 7/7 | LCR |
| Pfhxa | 0.0094 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025 | 2/7 | UCMR-5 |
| PFHXS | 0.0071 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025 | 2/7 | UCMR-5 |
| PFOA | 0.0053 µg/L No EPA limit set Main supplier: BRIGHTON CITY OF · 56,304 people · 2025 | 1/7 | UCMR-5 |
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 Brighton
| Supplier | Population served |
|---|---|
| BRIGHTON CITY OF | 56,304 |
| TODD CREEK VILLAGE MD | 7,363 |
| HI LAND ACRES WSD | 350 |
| MOUNTAIN VIEW WUA | 320 |
| NORTH WASHINGTON WUA | 90 |
| THIRD CREEK WUA | 90 |
| HOPE DITCH CO | 63 |
Frequently asked questions about Brighton tap water
Is Brighton tap water safe to drink?
EPA testing detected 35 contaminants in the water serving Brighton. 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 Brighton?
7 public water suppliers report drinking-water monitoring for Brighton, Colorado to the EPA. Each is listed above with its population served.
What contaminants are in Brighton's water?
The contaminants EPA monitoring detected in Brighton include Nitrate, Nitrate-Nitrite, Fluoride, Ethylbenzene, TTHM. 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.