No health-based violations on EPA record since 2016.
Serves about 17,466 people (7,130 connections) with surface water from its own intake, and buys water from Northern Ohio Rural Water.
From EPA's record for OH3901111. PurityMap is independent of Norwalk City PWS.
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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 2023 to October 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorobutanoic acid (PFBA) | 10.2 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 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 | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 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 | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 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 | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 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 | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 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 | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 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 | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| 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 | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-24 to 2023-10-04 | UCMR5 Analytical Results: NORWALK CITY PWS (OH3901111) |
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 →Norwalk City PWS's phone number on EPA record is 419-663-6736. Its mailing address is 38 WHITTLESEY AVE, NORWALK, OH 44857.
According to EPA's record, Norwalk City PWS uses surface water from its own intake, and buys water from Northern Ohio Rural Water.
No health-based violations on EPA record since 2016. EPA also lists 4 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 Norwalk City PWS'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 Norwalk City PWS. Its phone number on EPA record is 419-663-6736. Its mailing address on EPA record is 38 WHITTLESEY AVE, NORWALK, OH 44857. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.