What was found in Marion'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 | 2190 µg/L 22% of the EPA limit 10000 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 2082 µg/L 21% of the EPA limit 10000 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2015 | 2/2 | SYR4 |
| Fluoride | 729 µg/L 18% of the EPA limit 4000 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019 | 2/2 | SYR4 |
| Copper | 280 µg/L 22% of the EPA limit 1300 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 287.7 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| TTHM | 23.95 µg/L 30% of the EPA limit 80 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 83.22 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Barium | 41.18 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 50.075 µg/L — CITY OF MARION · 1,971 people · 2018 | 2/2 | SYR4 |
| Lithium | 41 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2023 | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 19.63 µg/L 33% of the EPA limit 60 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 34.14 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Chloroform | 11.5 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 31.3 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 7.58 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 28.035 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 8.67 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 20.225 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 13.04 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 18.98 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 7.445 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 9.325 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Bromoform | 5.645 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 9.105 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 8.205 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 5.245 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 8.16 µg/L — CITY OF MARION · 1,971 people · 2019 | 2/2 | SYR4 |
| Xylenes, Total | 7.8 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019 | 1/2 | SYR4 |
| Lead | 6.385 µg/L 43% of the EPA limit 15 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 4.855 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2019
Highest in the city: 6.23 µg/L — CITY OF MARION · 1,971 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: CITY OF MARION · 1,971 people · 2015 | 1/2 | SYR4 |
| Dalapon | 1.2 µg/L 0.6% of the EPA limit 200 µg/L Highest in the city: CITY OF MARION · 1,971 people · 2019 | 1/2 | SYR4 |
| Ethylbenzene | 1.16 µg/L 0.2% of the EPA limit 700 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9200 µg/L 15% of the EPA limit 6 µg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0018 mg/L 12% of the EPA limit 0.0150 mg/L Main supplier: GREEN VALLEY SUD · 52,497 people · 2025
Highest in the city: 0.0050 mg/L — CITY OF MARION · 1,971 people · 2025 | 2/2 | LCR |
| Pfpea | 0.0049 µg/L No EPA limit set Main supplier: GREEN VALLEY SUD · 52,497 people · 2023 | 1/2 | UCMR-5 |
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 Marion
| Supplier | Population served |
|---|---|
| GREEN VALLEY SUD | 52,497 |
| CITY OF MARION | 1,971 |
Frequently asked questions about Marion tap water
Is Marion tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Marion. 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 Marion?
2 public water suppliers report drinking-water monitoring for Marion, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Marion's water?
The contaminants EPA monitoring detected in Marion 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.