What was found in Highland'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 | 2100 µg/L 21% of the EPA limit 10000 µg/L Main supplier: HIGHLAND · 10,674 people · 2019 | 1/3 | SYR4 |
| Nitrate-Nitrite | 1156 µg/L 12% of the EPA limit 10000 µg/L Main supplier: HIGHLAND · 10,674 people · 2018 | 1/3 | SYR4 |
| Fluoride | 1133 µg/L 28% of the EPA limit 4000 µg/L Main supplier: HIGHLAND · 10,674 people · 2019 | 1/3 | SYR4 |
| Copper | 250.99999999999994 µg/L 19% of the EPA limit 1300 µg/L Main supplier: HIGHLAND · 10,674 people · 2017
Highest in the city: 831.9999999999993 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| TTHM | 63.00000000000001 µg/L 79% of the EPA limit 80 µg/L Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 123.75 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Chloroform | 49.76500000000001 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 107.6 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 57.19999999999999 µg/L 95% of the EPA limit 60 µg/L Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 78.92999999999998 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Barium | 56.599999999999994 µg/L 2.8% of the EPA limit 2000 µg/L Main supplier: HIGHLAND · 10,674 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 31 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 49.17999999999997 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 32.54999999999998 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 35.31999999999996 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Lead | 12.499999999999986 µg/L 83% of the EPA limit 15 µg/L Main supplier: HIGHLAND · 10,674 people · 2017
Highest in the city: 24.1 µg/L — COUNTRY HILLS WTR, INC. · 166 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 11.045 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 17 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 14.249999999999998 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 3.085 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 5.21 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 2.2199999999999998 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2019
Highest in the city: 4.6425 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 2.1639999999999997 µg/L No EPA limit set Highest in the city: TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 1/3 | SYR4 |
| Arsenic | 1.1 µg/L 11% of the EPA limit 10 µg/L Main supplier: HIGHLAND · 10,674 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.8140 pCi/L 16% of the EPA limit 5 pCi/L Main supplier: HIGHLAND · 10,674 people · 2014 | 1/3 | SYR4 |
| Simazine | 0.4560 µg/L 11% of the EPA limit 4 µg/L Main supplier: HIGHLAND · 10,674 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0072 µg/L No EPA limit set Main supplier: HIGHLAND · 10,674 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0017 mg/L 11% of the EPA limit 0.0150 mg/L Main supplier: HIGHLAND · 10,674 people · 2025 | 3/3 | 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 Highland
| Supplier | Population served |
|---|---|
| HIGHLAND | 10,674 |
| TRITOWNSHIP WATER DISTRICT | 3,470 |
| COUNTRY HILLS WTR, INC. | 166 |
Frequently asked questions about Highland tap water
Is Highland tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Highland. 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 Highland?
3 public water suppliers report drinking-water monitoring for Highland, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Highland's water?
The contaminants EPA monitoring detected in Highland include Nitrate, Nitrate-Nitrite, Fluoride, Copper, 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.