Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
4
health-based violations
32
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2007-04-01 → 2007-06-30 |
| MCL | Health-based | Resolved | 2007-04-01 → 2007-06-30 |
| MCL | Health-based | Resolved | 2007-04-01 → 2007-06-30 |
| MCL | Health-based | Resolved | 2007-04-01 → 2007-06-30 |
| Other | Monitoring | Resolved | 2024-07-02 |
| Other | Monitoring | Resolved | 2024-07-02 |
| MR | Monitoring | Archived | 2022-01-01 → 2024-12-31 |
| MR | Monitoring | Archived | 2022-01-01 → 2024-12-31 |
| MR | Monitoring | Archived | 2022-01-01 → 2024-12-31 |
| MR | Monitoring | Archived | 2022-01-01 → 2024-12-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0054 µg/L | 2/9 | 2025 |
Other contaminants detected
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 this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 430 µg/L 4.3% of the EPA limit 10000 µg/L
worst single sample: 4400 µg/L | 130/138 | SYR4 | 2012–2019 |
| Bromodichloromethane | 23 µg/L No EPA limit set
worst single sample: 36.1 µg/L | 81/81 | SYR4 | 2012–2019 |
| Chloroform | 33.1 µg/L No EPA limit set
worst single sample: 42.7 µg/L | 81/81 | SYR4 | 2012–2019 |
| Copper | 538.4 µg/L 41% of the EPA limit 1300 µg/L
worst single sample: 809 µg/L | 60/70 | SYR4 | 2013–2019 |
| Dibromochloromethane | 24.82 µg/L No EPA limit set
worst single sample: 33.8 µg/L | 57/81 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 30.17 µg/L No EPA limit set
worst single sample: 45.5 µg/L | 44/44 | SYR4 | 2013–2019 |
| TTHM | 44.03 µg/L 55% of the EPA limit 80 µg/L
worst single sample: 54.5 µg/L | 44/46 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 44.79 µg/L 75% of the EPA limit 60 µg/L
worst single sample: 70.8 µg/L | 44/44 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 13.275 µg/L No EPA limit set
worst single sample: 18.5 µg/L | 44/44 | SYR4 | 2013–2019 |
| Monochloroacetic Acid | 4.68 µg/L No EPA limit set
worst single sample: 6.8 µg/L | 29/44 | SYR4 | 2013–2019 |
| Lead | 1.868 µg/L 12% of the EPA limit 15 µg/L
worst single sample: 2.46 µg/L | 25/70 | SYR4 | 2013–2019 |
| Barium | 45.28 µg/L 2.3% of the EPA limit 2000 µg/L
worst single sample: 46 µg/L | 19/19 | SYR4 | 2013–2019 |
| Fluoride | 764.3 µg/L 19% of the EPA limit 4000 µg/L
worst single sample: 776 µg/L | 19/19 | SYR4 | 2013–2019 |
| Bromoform | 5.104 µg/L No EPA limit set
worst single sample: 5.2 µg/L | 17/81 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 455.25 µg/L 4.6% of the EPA limit 10000 µg/L
worst single sample: 477 µg/L | 16/18 | SYR4 | 2012–2015 |
| Dibromoacetic Acid | 2.47 µg/L No EPA limit set
worst single sample: 5.2 µg/L | 15/44 | SYR4 | 2013–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 15/15 | LCR | 2025 |
| Combined Radium (-226 And -228) | 2.76 pCi/L 55% of the EPA limit 5 pCi/L
worst single sample: 3.3 pCi/L | 7/7 | SYR4 | 2012–2018 |
| Lithium | 18 µg/L No EPA limit set | 7/15 | UCMR-5 | 2025 |
| Nitrite | 126 µg/L 13% of the EPA limit 1000 µg/L
worst single sample: 130 µg/L | 5/18 | SYR4 | 2012–2015 |
| Chromium | 3.5005 µg/L 3.5% of the EPA limit 100 µg/L
worst single sample: 3.73 µg/L | 4/19 | SYR4 | 2013–2019 |
| Cyanide | 59.98 µg/L 30% of the EPA limit 200 µg/L
worst single sample: 62.1 µg/L | 3/12 | SYR4 | 2014–2017 |
| Gross Beta Particle Activity | 5.38 pCi/L No EPA limit set
worst single sample: 5.4 pCi/L | 3/8 | SYR4 | 2012–2018 |
| Arsenic | 1.14 µg/L 11% of the EPA limit 10 µg/L | 1/19 | SYR4 | 2013–2019 |
| Gross Alpha, Excl. Radon And U | 3.3 pCi/L 22% of the EPA limit 15 pCi/L | 1/7 | SYR4 | 2015–2018 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set | 1/44 | SYR4 | 2013–2019 |
| Selenium | 3.12 µg/L 6.2% of the EPA limit 50 µg/L | 1/19 | SYR4 | 2013–2019 |
| Thallium, Total | 0.7700 µg/L 39% of the EPA limit 2 µg/L | 1/19 | SYR4 | 2013–2019 |
80 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Diana Sud
Is Diana Sud tap water safe to drink?
EPA monitoring detected 29 contaminants in Diana Sud's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Diana Sud's water?
EPA monitoring detected Nitrate, Bromodichloromethane, Chloroform, Copper, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Diana Sud serve?
Diana Sud reports serving 7,320 people in Texas, per its EPA record.
Has Diana Sud had any water quality violations?
The EPA has 32 violations on file for Diana Sud, of which 4 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.