Combined radium-226/228 above the legal limit in the period starting January 2026.
Serves about 9,564 people (3,600 connections) with groundwater from its own wells.
From EPA's record for IA7930008. PurityMap is independent of Grinnell Water Department.
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13 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2026 | Combined radium-226/228 | 8.13 pCi/L | 5 pCi/L | Archived |
| From October 2025 | Combined radium-226/228 | 7.79 pCi/L | 5 pCi/L | Archived |
| From April 2025 | Combined radium-226/228 | 6.4 pCi/L | 5 pCi/L | Archived |
| From January 2025 | Combined radium-226/228 | 6.45 pCi/L | 5 pCi/L | Archived |
| From January 2025 | Gross alpha particles | 22 pCi/L | 15 pCi/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2024 | Gross alpha particles | 21.8 pCi/L | 15 pCi/L | Archived |
| From October 2024 | Combined radium-226/228 | 7.325 pCi/L | 5 pCi/L | Archived |
| From July 2024 | Gross alpha particles | 20.5 pCi/L | 15 pCi/L | Archived |
| From July 2024 | Combined radium-226/228 | 7.94 pCi/L | 5 pCi/L | Archived |
| From April 2024 | Gross alpha particles | 20.1 pCi/L | 15 pCi/L | Archived |
| From April 2024 | Combined radium-226/228 | 8.36 pCi/L | 5 pCi/L | Archived |
| From January 2024 | Gross alpha particles | 15.65 pCi/L | 15 pCi/L | Archived |
| From January 2024 | Combined radium-226/228 | 6.2 pCi/L | 5 pCi/L | Archived |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2024 to August 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 140 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 | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| 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 | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| 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 | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| 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 | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| 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 | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| 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 | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| 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 | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-08-06 | UCMR5 Analytical Results: GRINNELL WATER DEPARTMENT (IA7930008) |
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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.
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Follow this water →Grinnell Water Department's phone number on EPA record is 641-990-7521. Its mailing address is ATTN KEAGAN RICHMOND WATER RES DIR, 520 4TH AVE, GRINNELL, IA 50112-1947.
According to EPA's record, Grinnell Water Department uses groundwater from its own wells.
EPA's record shows 13 health-based violations for Grinnell Water Department in the 10 years to July 9, 2026. Combined radium-226/228 was above the legal limit in the period starting January 2026. EPA also lists 5 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Grinnell Water Department's latest lead and copper round, which ended in December 2025, was 3.1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Grinnell Water Department. Its phone number on EPA record is 641-990-7521. Its mailing address on EPA record is ATTN KEAGAN RICHMOND WATER RES DIR, 520 4TH AVE, GRINNELL, IA 50112-1947. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.