What was found in Cavalier'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 |
|---|---|---|---|
| Copper | 651.8999999999999 µg/L 50% of the EPA limit 1300 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019 | 2/2 | SYR4 |
| Fluoride | 635 µg/L 16% of the EPA limit 4000 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2017 | 1/2 | SYR4 |
| Barium | 184 µg/L 9.2% of the EPA limit 2000 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2017 | 1/2 | SYR4 |
| Nitrate-Nitrite | 80 µg/L 0.8% of the EPA limit 10000 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019 | 1/2 | SYR4 |
| TTHM | 14.756 µg/L 18% of the EPA limit 80 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019
Highest in the city: 20.194 µg/L — CAVALIER CITY OF · 1,302 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.442999999999998 µg/L 19% of the EPA limit 60 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019
Highest in the city: 14.293999999999997 µg/L — CAVALIER CITY OF · 1,302 people · 2019 | 2/2 | SYR4 |
| Chloroform | 8.991 µg/L No EPA limit set Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019
Highest in the city: 13.537999999999998 µg/L — CAVALIER CITY OF · 1,302 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 4.963 µg/L No EPA limit set Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019
Highest in the city: 7.428999999999999 µg/L — CAVALIER CITY OF · 1,302 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 4.212000000000001 µg/L No EPA limit set Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019
Highest in the city: 5.421 µg/L — CAVALIER CITY OF · 1,302 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 4.288 µg/L No EPA limit set Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019
Highest in the city: 4.888 µg/L — CAVALIER CITY OF · 1,302 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 3.98 µg/L No EPA limit set Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019 | 2/2 | SYR4 |
| Lead | 3.140999999999997 µg/L 21% of the EPA limit 15 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 2.3120000000000003 µg/L 7.7% of the EPA limit 30 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2018 | 1/2 | SYR4 |
| Dibromochloromethane | 1.498 µg/L No EPA limit set Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2019
Highest in the city: 1.768 µg/L — CAVALIER CITY OF · 1,302 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.62 pCi/L 11% of the EPA limit 15 pCi/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2018 | 1/2 | SYR4 |
| Arsenic | 1.46 µg/L 15% of the EPA limit 10 µg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2016 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.1212 pCi/L 22% of the EPA limit 5 pCi/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 people · 2018 | 1/2 | SYR4 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: NORTHEAST RWD- NORTH VALLEY BRANCH · 3,422 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.
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 Cavalier
| Supplier | Population served |
|---|---|
| NORTHEAST RWD- NORTH VALLEY BRANCH | 3,422 |
| CAVALIER CITY OF | 1,302 |
Frequently asked questions about Cavalier tap water
Is Cavalier tap water safe to drink?
EPA testing detected 18 contaminants in the water serving Cavalier. 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 Cavalier?
2 public water suppliers report drinking-water monitoring for Cavalier, North Dakota to the EPA. Each is listed above with its population served.
What contaminants are in Cavalier's water?
The contaminants EPA monitoring detected in Cavalier include Copper, Fluoride, Barium, Nitrate-Nitrite, 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.