What was found in Caldwell'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 | 57.5 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2015
Highest in the city: 567.5 µg/L — COOKS POINT WSC · 68 people · 2019 | 3/4 | SYR4 |
| Nitrate | 60 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2019
Highest in the city: 514.9999999999999 µg/L — COOKS POINT WSC · 68 people · 2019 | 3/4 | SYR4 |
| Nitrite | 426.4 µg/L 43% of the EPA limit 1000 µg/L Highest in the city: COOKS POINT WSC · 68 people · 2019 | 1/4 | SYR4 |
| Copper | 338.9999999999999 µg/L 26% of the EPA limit 1300 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 4/4 | SYR4 |
| Fluoride | 208.5 µg/L 5.2% of the EPA limit 4000 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2017
Highest in the city: 240 µg/L — EPCOR 130 PROJECT · 0 people · 2012 | 3/4 | SYR4 |
| Barium | 20.375 µg/L 1% of the EPA limit 2000 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2019
Highest in the city: 130 µg/L — EPCOR 130 PROJECT · 0 people · 2012 | 3/4 | SYR4 |
| TTHM | 40.915 µg/L 51% of the EPA limit 80 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 2/4 | SYR4 |
| Lithium | 26.8 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2023 | 1/4 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 20.67499999999999 µg/L 34% of the EPA limit 60 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 14.52 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019
Highest in the city: 15 µg/L — COOKS POINT WSC · 68 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 13.84 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 4/4 | SYR4 |
| Chloroform | 8.82 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019
Highest in the city: 9.7 µg/L — COOKS POINT WSC · 68 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 8.899999999999995 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 2/4 | SYR4 |
| Dichloroacetic Acid | 6.704999999999998 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 1/4 | SYR4 |
| Monochloroacetic Acid | 5.4 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 1/4 | SYR4 |
| Bromoform | 3.5599999999999987 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019
Highest in the city: 5.1 µg/L — COOKS POINT WSC · 68 people · 2019 | 4/4 | SYR4 |
| Lead | 4.7799999999999985 µg/L 32% of the EPA limit 15 µg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 3.07 pCi/L 61% of the EPA limit 5 pCi/L Main supplier: CITY OF CALDWELL · 4,358 people · 2018 | 2/4 | SYR4 |
| Trichloroacetic Acid | 2.88 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 1/4 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: CITY OF CALDWELL · 4,358 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0011 mg/L 7.5% of the EPA limit 0.0150 mg/L Main supplier: CITY OF CALDWELL · 4,358 people · 2025
Highest in the city: 0.0050 mg/L — COOKS POINT WSC · 68 people · 2024 | 2/4 | 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 Caldwell
| Supplier | Population served |
|---|---|
| CITY OF CALDWELL | 4,358 |
| COOKS POINT WSC | 68 |
| 130 REGIONAL WSC | 0 |
| EPCOR 130 PROJECT | 0 |
Frequently asked questions about Caldwell tap water
Is Caldwell tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Caldwell. 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 Caldwell?
4 public water suppliers report drinking-water monitoring for Caldwell, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Caldwell's water?
The contaminants EPA monitoring detected in Caldwell include Nitrate-Nitrite, Nitrate, Nitrite, Copper, Fluoride. 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.