What was found in Marlin'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 |
|---|---|---|---|
| Fluoride | 559 µg/L 14% of the EPA limit 4000 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019
Highest in the city: 3148 µg/L — TRI COUNTY SUD · 5,353 people · 2019 | 2/2 | SYR4 |
| Copper | 1002.5 µg/L 77% of the EPA limit 1300 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2017 | 2/2 | SYR4 |
| Nitrate | 930 µg/L 9.3% of the EPA limit 10000 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Lithium | 325 µg/L No EPA limit set Highest in the city: TRI COUNTY SUD · 5,353 people · 2023 | 1/2 | UCMR-5 |
| Barium | 80.78 µg/L 4% of the EPA limit 2000 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019
Highest in the city: 184 µg/L — TRI COUNTY SUD · 5,353 people · 2019 | 2/2 | SYR4 |
| Cyanide | 181.6 µg/L 91% of the EPA limit 200 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 1/2 | SYR4 |
| TTHM | 109.8 µg/L 137% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 103.2 µg/L 172% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 103 µg/L 1% of the EPA limit 10000 µg/L Highest in the city: TRI COUNTY SUD · 5,353 people · 2015 | 1/2 | SYR4 |
| Chloroform | 89.92 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 54.82 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 46.6 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 30.98 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2.278 µg/L 23% of the EPA limit 10 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019
Highest in the city: 28.64 µg/L — TRI COUNTY SUD · 5,353 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 20.925 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Bromoform | 16.745 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Lead | 10.74 µg/L 72% of the EPA limit 15 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2017
Highest in the city: 16.56 µg/L — TRI COUNTY SUD · 5,353 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 10.7 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 9.86 pCi/L No EPA limit set Highest in the city: TRI COUNTY SUD · 5,353 people · 2016 | 1/2 | SYR4 |
| Monochloroacetic Acid | 9.84 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 5.6 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 1/2 | SYR4 |
| Selenium | 4.11 µg/L 8.2% of the EPA limit 50 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019
Highest in the city: 4.145 µg/L — TRI COUNTY SUD · 5,353 people · 2019 | 2/2 | SYR4 |
| Chromium | 2.886 µg/L 2.9% of the EPA limit 100 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019
Highest in the city: 3.925 µg/L — TRI COUNTY SUD · 5,353 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Highest in the city: TRI COUNTY SUD · 5,353 people · 2016 | 1/2 | SYR4 |
| Xylenes, Total | 0.8800 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: TRI COUNTY SUD · 5,353 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.4395 µg/L 15% of the EPA limit 3 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 0.4150 µg/L 21% of the EPA limit 2 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 1/2 | SYR4 |
| 2,4-D | 0.2000 µg/L 0.3% of the EPA limit 70 µg/L Main supplier: CITY OF MARLIN · 5,967 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0062 µg/L No EPA limit set Main supplier: CITY OF MARLIN · 5,967 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MARLIN · 5,967 people · 2024 | 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 Marlin
| Supplier | Population served |
|---|---|
| CITY OF MARLIN | 5,967 |
| TRI COUNTY SUD | 5,353 |
Frequently asked questions about Marlin tap water
Is Marlin tap water safe to drink?
EPA testing detected 30 contaminants in the water serving Marlin. 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 Marlin?
2 public water suppliers report drinking-water monitoring for Marlin, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Marlin's water?
The contaminants EPA monitoring detected in Marlin include Fluoride, Copper, Nitrate, Lithium, Barium. 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.