No health-based violations on EPA record since 2016.
Serves about 650 people (260 connections) with groundwater from its own wells.
From EPA's record for SD4602270. PurityMap is independent of Sun Valley Development.
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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 May 2024 to November 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| 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 | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| 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 | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| 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 | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| 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 | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| 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 | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-14 to 2024-11-06 | UCMR5 Analytical Results: SUN VALLEY DEVELOPMENT (SD4602270) |
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 →According to EPA's record, Sun Valley Development uses groundwater from its own wells.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Sun Valley Development's latest lead and copper round, which ended in December 2025, was 6 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Sun Valley Development. Its mailing address on EPA record is PO BOX 9141, RAPID CITY, SD 57709. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.