Linn County Water Quality: 2 Cities Ranked by the Records
Linn County, Iowa: 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.
LithiumDetected in 1 system of 2 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest182 µg/L
- MARION MUNICIPAL WATER DEPT182 µg/LSample date: 2024-07-09 to 2025-01-14
- CEDAR RAPIDS WATER DEPARTMENTNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-01-17 to 2023-10-16
Lead (90th percentile)Detected in 2 systems15 µg/L federal action level · US EPAHighest8.3 µg/L
- MARION MUNICIPAL WATER DEPT8.3 µg/LMonitoring period: 2022–2024
- CEDAR RAPIDS WATER DEPARTMENT1.62 µg/LMonitoring period: 2025–2025
29 PFAS tested, none detected in any systemShow
Tested in these 2 systems: CEDAR RAPIDS WATER DEPARTMENT, MARION MUNICIPAL WATER DEPT
- 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)
- 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)
- Perfluorobutanesulfonic acid (PFBS)
- Perfluorobutanoic acid (PFBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorohexanesulfonic acid (PFHxS)
- Perfluorohexanoic acid (PFHxA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanesulfonic acid (PFOS)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluoropentanoic acid (PFPeA)
- 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 IowaLargest water systems
- Cedar RapidsCEDAR RAPIDS WATER DEPARTMENT · IA5715093142,364 served
- MarionMARION MUNICIPAL WATER DEPT · IA575103541,623 served
Frequently asked
How does Linn County tap water compare across cities?
PurityMap ranks 2 cities in Linn 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 Cedar Rapids's main water system: CEDAR RAPIDS WATER DEPARTMENT · PWSID IA5715093 · Purity Score 98 (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 Linn County cities had a PFAS sample above a 2024 EPA limit?
None of the 2 Linn County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 0.
Is there lead in Linn County tap water?
Utilities report lead as a 90th-percentile result from home taps. 2 of 2 Linn 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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