No health-based violations on EPA record since 2016.
Serves about 7,320 people (2,440 connections) with surface water bought from Northeast Texas MWD.
From EPA's record for TX2300006. PurityMap is independent of Diana SUD.
Are you this utility? Correct this listing →
No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from April 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 18 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2025-04-09 to 2025-10-08 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorobutanoic acid (PFBA) | 5.4 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-08 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-08 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-08 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-08 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-09 to 2025-10-15 | UCMR5 Analytical Results: DIANA SUD (TX2300006) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →Diana SUD's phone number on EPA record is 903-968-6163. Its mailing address is PO BOX 74, DIANA, TX 75640-0074.
According to EPA's record, Diana SUD uses surface water bought from Northeast Texas MWD.
No health-based violations on EPA record since 2016. EPA also lists 26 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Diana SUD's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Diana SUD. Its phone number on EPA record is 903-968-6163. Its mailing address on EPA record is PO BOX 74, DIANA, TX 75640-0074. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.