What was found in Havre'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 | 140 µg/L 1.4% of the EPA limit 10000 µg/L Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 2715 µg/L — EAST END COLONY INC · 100 people · 2019 | 4/8 | SYR4 |
| Fluoride | 2295 µg/L 57% of the EPA limit 4000 µg/L Highest in the city: HARTLAND COLONY · 73 people · 2017 | 2/8 | SYR4 |
| Copper | 517.75 µg/L 40% of the EPA limit 1300 µg/L Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 1258 µg/L — HILL COUNTY WATER DISTRICTS · 1,720 people · 2018 | 7/8 | SYR4 |
| Barium | 220 µg/L 11% of the EPA limit 2000 µg/L Highest in the city: HARTLAND COLONY · 73 people · 2017 | 1/8 | SYR4 |
| Nitrate | 170 µg/L 1.7% of the EPA limit 10000 µg/L Highest in the city: HILL COUNTY WATER DISTRICTS · 1,720 people · 2017 | 1/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 35.9 µg/L 60% of the EPA limit 60 µg/L Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 98.2 µg/L — NCMRWA TIBER SERVICE AREA · 200 people · 2019 | 7/8 | SYR4 |
| TTHM | 67.9 µg/L 85% of the EPA limit 80 µg/L Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 95.6 µg/L — NCMRWA TIBER SERVICE AREA · 200 people · 2019 | 8/8 | SYR4 |
| Chloroform | 49.9 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 83.2 µg/L — NCMRWA TIBER SERVICE AREA · 200 people · 2019 | 8/8 | SYR4 |
| Trichloroacetic Acid | 17.9 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 47.8 µg/L — NCMRWA TIBER SERVICE AREA · 200 people · 2019 | 7/8 | SYR4 |
| Dichloroacetic Acid | 17.35 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 40.4 µg/L — NCMRWA TIBER SERVICE AREA · 200 people · 2019 | 7/8 | SYR4 |
| Bromodichloromethane | 21 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019 | 8/8 | SYR4 |
| Lead | 3 µg/L 20% of the EPA limit 15 µg/L Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 19.5 µg/L — NORTH HAVRE COUNTY WATER DIST · 90 people · 2017 | 7/8 | SYR4 |
| Lithium | 17 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2024 | 1/8 | UCMR-5 |
| Selenium | 16 µg/L 32% of the EPA limit 50 µg/L Highest in the city: HARTLAND COLONY · 73 people · 2017 | 2/8 | SYR4 |
| Dibromochloromethane | 11 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 14.24 µg/L — HILLDALE COLONY · 79 people · 2019 | 8/8 | SYR4 |
| Monochloroacetic Acid | 4.675 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 11 µg/L — NCMRWA TIBER SERVICE AREA · 200 people · 2019 | 6/8 | SYR4 |
| Chromium | 5 µg/L 5% of the EPA limit 100 µg/L Highest in the city: HARTLAND COLONY · 73 people · 2017 | 1/8 | SYR4 |
| Dibromoacetic Acid | 2.49 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 4.84 µg/L — HARTLAND COLONY · 73 people · 2017 | 7/8 | SYR4 |
| Bromoform | 2.8 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019
Highest in the city: 4.56 µg/L — HILLDALE COLONY · 79 people · 2019 | 6/8 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Highest in the city: HARTLAND COLONY · 73 people · 2017 | 1/8 | SYR4 |
| Combined Radium (-226 And -228) | 2.2 pCi/L 44% of the EPA limit 5 pCi/L Highest in the city: EAST END COLONY INC · 100 people · 2019 | 1/8 | SYR4 |
| Combined Uranium | 2 µg/L 6.7% of the EPA limit 30 µg/L Highest in the city: HARTLAND COLONY · 73 people · 2017 | 2/8 | SYR4 |
| Monobromoacetic Acid | 1.65 µg/L No EPA limit set Main supplier: HAVRE CITY OF · 9,921 people · 2019 | 6/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.5 pCi/L 10% of the EPA limit 15 pCi/L Highest in the city: EAST END COLONY INC · 100 people · 2019 | 1/8 | SYR4 |
| Dichloromethane | 0.7300 µg/L 15% of the EPA limit 5 µg/L Highest in the city: HARTLAND COLONY · 73 people · 2017 | 1/8 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: HAVRE CITY OF · 9,921 people · 2025
Highest in the city: 0.0110 mg/L — NCMRWA NORTH HAVRE CWD LEG · 90 people · 2025 | 7/8 | 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 Havre
| Supplier | Population served |
|---|---|
| HAVRE CITY OF | 9,921 |
| HILL COUNTY WATER DISTRICTS | 1,720 |
| NCMRWA TIBER SERVICE AREA | 200 |
| EAST END COLONY INC | 100 |
| NCMRWA NORTH HAVRE CWD LEG | 90 |
| NORTH HAVRE COUNTY WATER DIST | 90 |
| HILLDALE COLONY | 79 |
| HARTLAND COLONY | 73 |
Frequently asked questions about Havre tap water
Is Havre tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Havre. 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 Havre?
8 public water suppliers report drinking-water monitoring for Havre, Montana to the EPA. Each is listed above with its population served.
What contaminants are in Havre's water?
The contaminants EPA monitoring detected in Havre include Nitrate-Nitrite, Fluoride, Copper, Barium, Nitrate. 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.