No health-based violations on EPA record since 2016.
Serves about 5,102 people (2,124 connections) with surface water bought from Western Area Water Supply Authority.
From EPA's record for ND5301079. PurityMap is independent of Northwest Rural Water District.
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 March 2023 to December 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 62.1 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 | 2023-03-21 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorobutanoic acid (PFBA) | 6.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| 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 | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| 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 | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| 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 | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| 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 | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| 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 | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-21 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-21 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| 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 | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-21 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-21 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2023-12-04 | UCMR5 Analytical Results: NORTHWEST RURAL WATER DISTRICT (ND5301079) |
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 →Northwest Rural Water District's phone number on EPA record is 701-774-8915. Its mailing address is 5091 142ND AVE NW, PO BOX 1285, WILLISTON, ND 58802-1285.
According to EPA's record, Northwest Rural Water District uses surface water bought from Western Area Water Supply Authority.
No health-based violations on EPA record since 2016. EPA also lists 2 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 Northwest Rural Water District's latest lead and copper round, which ended in December 2023. The federal action level is 15 µg/L.
PurityMap has no verified website for Northwest Rural Water District. Its phone number on EPA record is 701-774-8915. Its mailing address on EPA record is 5091 142ND AVE NW, PO BOX 1285, WILLISTON, ND 58802-1285. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.