No health-based violations on EPA record since 2016.
Serves about 8,537 people (3,415 connections) with surface water from its own intake.
From EPA's record for ND4501434. PurityMap is independent of Southwest Water Authority.
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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 January 2025 to November 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 52.3 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 | 2025-01-06 to 2025-10-07 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| 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 | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| 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 | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| 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 | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| 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 | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| 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 | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-07 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-07 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| 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 | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-07 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-07 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-11-05 | UCMR5 Analytical Results: SOUTHWEST WATER AUTHORITY (ND4501434) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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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 →Southwest Water Authority's phone number on EPA record is 701-225-0241. Its mailing address is 4665 2ND STREET SW, DICKINSON, ND 58601.
According to EPA's record, Southwest Water Authority uses surface water from its own intake.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Southwest Water Authority'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 Southwest Water Authority. Its phone number on EPA record is 701-225-0241. Its mailing address on EPA record is 4665 2ND STREET SW, DICKINSON, ND 58601. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.