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Updated 2026-09-16
County water report

Logan County Water Quality

Logan County, Illinois: one city report built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the map
Across the county's systems

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.

Perfluorooctanoic acid (PFOA)IL AMERICAN-LINCOLN4.0 ng/L federal MCL (2024) · US EPA5.7 ng/L
Copper (90th percentile)IL AMERICAN-LINCOLN1.3 mg/L federal action level · US EPA1.619 mg/L
Lead (90th percentile)IL AMERICAN-LINCOLN15 µg/L federal action level · US EPA2 µg/L
Perfluorohexanoic acid (PFHxA)IL AMERICAN-LINCOLN400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE5.9 ng/L
Perfluorobutanoic acid (PFBA)IL AMERICAN-LINCOLNNo federal or state limit; shown for transparency233.2 ng/L
Perfluoroheptanoic acid (PFHpA)IL AMERICAN-LINCOLNNo federal or state limit; shown for transparency3.9 ng/L
Perfluoropentanoic acid (PFPeA)IL AMERICAN-LINCOLNNo federal or state limit; shown for transparency7.8 ng/L
25 substances tested, none detected in this systemShow

Tested in this system: IL AMERICAN-LINCOLN

  • 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)
  • Perfluorobutanesulfonic acid (PFBS)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorohexanesulfonic acid (PFHxS)
  • Perfluorononanoic acid (PFNA)
  • Perfluorooctanesulfonic acid (PFOS)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
1 city

Cities ranked by the records

Showing 1 of 1 cities · scores are system-level, not tap tests

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.

PFAS in Logan County1 of 1 city reports a regulated PFAS above the federal limit
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Illinois
Lead

0of 1 city 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 Illinois
Who supplies the county

Largest water systems

  1. LincolnIL AMERICAN-LINCOLN · IL1075030
    15,200 served
Questions

Frequently asked

How does Logan County tap water compare across cities?

PurityMap ranks 1 city in Logan 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 Lincoln's main water system: IL AMERICAN-LINCOLN · PWSID IL1075030 · Purity Score 40 (Poor) · 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 Logan County cities have PFAS above the federal limit?

1 city of 1 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Lincoln (PFOA 5.7 ng/L). PFAS were detected at any level in 1.

Is there lead in Logan County tap water?

Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Logan 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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