Tazewell County Water Quality: 4 Cities Ranked by the Records
Tazewell County, Illinois: 4 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 2 systems of 4 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest17.2 µg/L
- IL AMERICAN-PEKIN17.2 µg/LSample date: 2023-11-08 to 2024-06-17
- MORTON9.46 µg/LSample date: 2025-01-13 to 2025-07-07
- EAST PEORIANot detected · below 9.0 µg/L lab reporting limitSample date: 2023-09-05 to 2024-03-01
- WASHINGTONNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
Copper (90th percentile)Detected in 2 systems1.3 mg/L federal action level · US EPAHighest1.5 mg/L
- MORTON1.5 mg/LMonitoring period: 2024–2024
- EAST PEORIA1.4 mg/LMonitoring period: 2025–2025
Perfluorooctanesulfonic acid (PFOS)Detected in 2 systems of 4 tested4.0 ng/L federal MCL (2024) · US EPAHighest4.4 ng/L
- IL AMERICAN-PEKIN4.4 ng/LSample date: 2023-11-08 to 2024-06-17
- EAST PEORIA4.2 ng/LSample date: 2023-09-05 to 2024-03-01
- MORTONNot detected · below 4.0 ng/L lab reporting limitSample date: 2025-01-13 to 2025-07-07
- WASHINGTONNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
Perfluorohexanesulfonic acid (PFHxS)Detected in 2 systems of 4 tested10 ng/L federal MCL (2024) · US EPAHighest8.3 ng/L
- IL AMERICAN-PEKIN8.3 ng/LSample date: 2023-11-08 to 2024-06-17
- EAST PEORIA4.1 ng/LSample date: 2023-09-05 to 2024-03-01
- MORTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2025-01-13 to 2025-07-07
- WASHINGTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
Perfluorononanoic acid (PFNA)Detected in 1 system of 4 tested10 ng/L federal MCL (2024) · US EPAHighest4.5 ng/L
- IL AMERICAN-PEKIN4.5 ng/LSample date: 2023-11-08 to 2024-06-17
- EAST PEORIANot detected · below 4.0 ng/L lab reporting limitSample date: 2023-09-05 to 2024-03-01
- MORTONNot detected · below 4.0 ng/L lab reporting limitSample date: 2025-01-13 to 2025-07-07
- WASHINGTONNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
Lead (90th percentile)Detected in 1 system of 4 tested15 µg/L federal action level · US EPAHighest1 µg/L
- IL AMERICAN-PEKIN1 µg/LMonitoring period: 2025–2025
- EAST PEORIANot detectedMonitoring period: 2026–2026 (still open)
- MORTONNot detectedMonitoring period: 2026–2028 (still open)
- WASHINGTONNot detectedMonitoring period: 2022–2024
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 4 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest10.4 ng/L
- IL AMERICAN-PEKIN10.4 ng/LSample date: 2023-11-08 to 2024-06-17
- EAST PEORIA7.3 ng/LSample date: 2023-09-05 to 2024-03-01
- MORTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2025-01-13 to 2025-07-07
- WASHINGTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 4 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest4.4 ng/L
- IL AMERICAN-PEKIN4.4 ng/LSample date: 2023-11-08 to 2024-06-17
- EAST PEORIANot detected · below 3.0 ng/L lab reporting limitSample date: 2023-09-05 to 2024-03-01
- MORTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2025-01-13 to 2025-07-07
- WASHINGTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
2 more contaminants detectedShow
Perfluorobutanoic acid (PFBA)Detected in 1 system of 4 testedNo federal or state limit; shown for transparencyHighest6 ng/L
- IL AMERICAN-PEKIN6 ng/LSample date: 2023-11-08 to 2024-06-17
- EAST PEORIANot detected · below 5.0 ng/L lab reporting limitSample date: 2023-09-05 to 2024-03-01
- MORTONNot detected · below 5.0 ng/L lab reporting limitSample date: 2025-01-13 to 2025-07-07
- WASHINGTONNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 4 testedNo federal or state limit; shown for transparencyHighest6.2 ng/L
- IL AMERICAN-PEKIN6.2 ng/LSample date: 2023-11-08 to 2024-06-17
- EAST PEORIA3 ng/LSample date: 2023-09-05 to 2024-03-01
- MORTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2025-01-13 to 2025-07-07
- WASHINGTONNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-17 to 2024-02-15
22 PFAS tested, none detected in any systemShow
Tested in these 4 systems: EAST PEORIA, IL AMERICAN-PEKIN, MORTON, WASHINGTON
- 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)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- 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 4 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 IllinoisLargest water systems
- PekinIL AMERICAN-PEKIN · IL179504031,731 served
- East PeoriaEAST PEORIA · IL179020022,484 served
- MortonMORTON · IL179050017,117 served
- WashingtonWASHINGTON · IL179075014,793 served
Frequently asked
How does Tazewell County tap water compare across cities?
PurityMap ranks 4 cities in Tazewell 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 Washington's main water system: WASHINGTON · PWSID IL1790750 · Purity Score 100 (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 Tazewell County cities had a PFAS sample above a 2024 EPA limit?
2 of 4 Tazewell County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Pekin (PFOS 4.4 ng/L), East Peoria (PFOS 4.2 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 2.
Is there lead in Tazewell County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 4 Tazewell 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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