Wood County Water Quality: 2 Cities Ranked by the Records
Wood County, Wisconsin: 2 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 2 tested4.0 ng/L federal MCL (2024) · US EPAHighest14 ng/L
- MARSHFIELD UTILITIES14 ng/LSample date: 2023-01-16 to 2023-07-12
- WIS RAPIDS WATER WORKS & LIGHTING COMMNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-12-04 to 2024-06-03
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 2 tested10 ng/L federal MCL (2024) · US EPAHighest14 ng/L
- MARSHFIELD UTILITIES14 ng/LSample date: 2023-01-16 to 2023-07-12
- WIS RAPIDS WATER WORKS & LIGHTING COMMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-12-04 to 2024-06-03
Lead (90th percentile)Detected in 2 systems15 µg/L federal action level · US EPAHighest8.3 µg/L
- WIS RAPIDS WATER WORKS & LIGHTING COMM8.3 µg/LMonitoring period: 2026–2026 (still open)
- MARSHFIELD UTILITIES8.2 µg/LMonitoring period: 2025–2025
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 2 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest3.2 ng/L
- MARSHFIELD UTILITIES3.2 ng/LSample date: 2023-01-16 to 2023-07-12
- WIS RAPIDS WATER WORKS & LIGHTING COMMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-12-04 to 2024-06-03
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 2 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest12 ng/L
- MARSHFIELD UTILITIES12 ng/LSample date: 2023-01-16 to 2023-07-12
- WIS RAPIDS WATER WORKS & LIGHTING COMMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-12-04 to 2024-06-03
Perfluorobutanoic acid (PFBA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest6.7 ng/L
- MARSHFIELD UTILITIES6.7 ng/LSample date: 2023-01-16 to 2023-07-12
- WIS RAPIDS WATER WORKS & LIGHTING COMMNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-12-04 to 2024-06-03
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest3.4 ng/L
- MARSHFIELD UTILITIES3.4 ng/LSample date: 2023-01-16 to 2023-07-12
- WIS RAPIDS WATER WORKS & LIGHTING COMMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-12-04 to 2024-06-03
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest14 ng/L
- MARSHFIELD UTILITIES14 ng/LSample date: 2023-01-16 to 2023-07-12
- WIS RAPIDS WATER WORKS & LIGHTING COMMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-12-04 to 2024-06-03
23 substances tested, none detected in any systemShow
Tested in these 2 systems: MARSHFIELD UTILITIES, WIS RAPIDS WATER WORKS & LIGHTING COMM
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- Lithium
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 2 cities above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in WisconsinLargest water systems
- Wisconsin RapidsWIS RAPIDS WATER WORKS & LIGHTING COMM · WI772010820,000 served
- MarshfieldMARSHFIELD UTILITIES · WI772016518,815 served
Frequently asked
How does Wood County tap water compare across cities?
PurityMap ranks 2 cities in Wood County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Wisconsin Rapids's main water system: WIS RAPIDS WATER WORKS & LIGHTING COMM · PWSID WI7720108 · Purity Score 91 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many Wood County cities had a PFAS sample above a 2024 EPA limit?
1 of 2 Wood County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Marshfield (PFOS 14 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 1.
Is there lead in Wood County tap water?
Utilities report lead as a 90th-percentile result from home taps. 2 of 2 Wood County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
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