What was found in Rocky Ford'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 | 3140 µg/L 31% of the EPA limit 10000 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 7/8 | SYR4 |
| Fluoride | 962.5 µg/L 24% of the EPA limit 4000 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 1947 µg/L — NORTH HOLBROOK WC · 58 people · 2018 | 8/8 | SYR4 |
| Nitrate-Nitrite | 1475 µg/L 15% of the EPA limit 10000 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2016 | 5/8 | SYR4 |
| Lithium | 48 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2025
Highest in the city: 309 µg/L — PATTERSON VALLEY WC · 96 people · 2024 | 3/8 | UCMR-5 |
| Bromate | 171.33 µg/L 1713% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: WEST GRAND VALLEY WA · 100 people · 2019 | 3/8 | SYR4 |
| TTHM | 74.525 µg/L 93% of the EPA limit 80 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 104.08 µg/L — NEWDALE GRAND VALLEY WC · 458 people · 2017 | 8/8 | SYR4 |
| Barium | 67.4 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 8/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19.82 µg/L 33% of the EPA limit 60 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 52.41 µg/L — HILLTOP WC · 285 people · 2017 | 8/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.064 pCi/L 47% of the EPA limit 15 pCi/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 43.8 pCi/L — PATTERSON VALLEY WC · 96 people · 2019 | 8/8 | SYR4 |
| Nitrite | 42 µg/L 4.2% of the EPA limit 1000 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2016 | 2/8 | SYR4 |
| Dibromochloromethane | 27.715 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 38.87 µg/L — NEWDALE GRAND VALLEY WC · 458 people · 2017 | 8/8 | SYR4 |
| Bromodichloromethane | 20.38 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 32.48 µg/L — NEWDALE GRAND VALLEY WC · 458 people · 2017 | 8/8 | SYR4 |
| Combined Radium (-226 And -228) | 0.3900 pCi/L 7.8% of the EPA limit 5 pCi/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2013
Highest in the city: 31.2 pCi/L — PATTERSON VALLEY WC · 96 people · 2019 | 8/8 | SYR4 |
| Combined Uranium | 19.8 µg/L 66% of the EPA limit 30 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 4/8 | SYR4 |
| Bromoform | 19.045 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 8/8 | SYR4 |
| Chloroform | 11.48 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 18.15 µg/L — NEWDALE GRAND VALLEY WC · 458 people · 2017 | 7/8 | SYR4 |
| Selenium | 14.7 µg/L 29% of the EPA limit 50 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 7/8 | SYR4 |
| Dichloroacetic Acid | 4.85 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 12.85 µg/L — NEWDALE GRAND VALLEY WC · 458 people · 2017 | 5/8 | SYR4 |
| Dibromoacetic Acid | 11.15 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 7/8 | SYR4 |
| Monochloroacetic Acid | 10.22 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 5/8 | SYR4 |
| Gross Beta Particle Activity | 9.7 pCi/L No EPA limit set Highest in the city: EUREKA WC · 498 people · 2015 | 1/8 | SYR4 |
| Trichloroacetic Acid | 4.695 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 6 µg/L — NEWDALE GRAND VALLEY WC · 458 people · 2017 | 4/8 | SYR4 |
| Chromium | 4 µg/L 4% of the EPA limit 100 µg/L Highest in the city: NORTH HOLBROOK WC · 58 people · 2018 | 5/8 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Highest in the city: NEWDALE GRAND VALLEY WC · 458 people · 2019 | 4/8 | SYR4 |
| Monobromoacetic Acid | 1.55 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019
Highest in the city: 2.4 µg/L — NEWDALE GRAND VALLEY WC · 458 people · 2017 | 3/8 | SYR4 |
| Thallium, Total | 0.8400 µg/L 42% of the EPA limit 2 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 1/8 | SYR4 |
| Xylenes, Total | 0.8200 µg/L 0% of the EPA limit 10000 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 1/8 | SYR4 |
| Antimony, Total | 0.7600 µg/L 13% of the EPA limit 6 µg/L Highest in the city: HILLTOP WC · 285 people · 2019 | 1/8 | SYR4 |
| Mercury | 0.2330 µg/L 12% of the EPA limit 2 µg/L Highest in the city: WEST GRAND VALLEY WA · 100 people · 2019 | 1/8 | SYR4 |
| Cadmium | 0.2000 µg/L 4% of the EPA limit 5 µg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2019 | 1/8 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ROCKY FORD CITY OF · 4,443 people · 2025
Highest in the city: 0.0110 mg/L — RIVERSIDE WC · 90 people · 2025 | 8/8 | LCR |
| PFBS | 0.0085 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2025 | 1/8 | UCMR-5 |
| PFHXS | 0.0060 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2025 | 1/8 | UCMR-5 |
| PFOS | 0.0041 µg/L No EPA limit set Main supplier: ROCKY FORD CITY OF · 4,443 people · 2025 | 1/8 | 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 Rocky Ford
| Supplier | Population served |
|---|---|
| ROCKY FORD CITY OF | 4,443 |
| EUREKA WC | 498 |
| NEWDALE GRAND VALLEY WC | 458 |
| HILLTOP WC | 285 |
| WEST GRAND VALLEY WA | 100 |
| PATTERSON VALLEY WC | 96 |
| RIVERSIDE WC | 90 |
| NORTH HOLBROOK WC | 58 |
Frequently asked questions about Rocky Ford tap water
Is Rocky Ford tap water safe to drink?
EPA testing detected 34 contaminants in the water serving Rocky Ford. 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 Rocky Ford?
8 public water suppliers report drinking-water monitoring for Rocky Ford, Colorado to the EPA. Each is listed above with its population served.
What contaminants are in Rocky Ford's water?
The contaminants EPA monitoring detected in Rocky Ford include Nitrate, Fluoride, Nitrate-Nitrite, Lithium, Bromate. 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.