Public water system record
Mount Zion
Serves Mount Zion, Macon County, IL · 5,833 people served
Federal records show 8 health-based violations and 3 monitoring/reporting issues for Mount Zion in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 8
- Resolved
- 8
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Mount Zion buys its water from Decatur.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2021.
- Most recent formal enforcement: compliance order (no penalty) by Illinois, August 2024.
- Record on file since 1981, with 21 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 2,228 service lines.
Check whether Mount Zion serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Oct 1, 2024 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2024 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Apr 1, 2024 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 1, 2024 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2021 | Resolved | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Jun 6, 2021 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Dec 30, 2021 | Resolved |
|
Public Notice
OTHER
|
Dec 30, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2019 | Resolved |
Full record since 1981
EPA's records for Mount Zion go back to 1981. Before October 19, 2016 they list 21 health-based violations (19 resolved, 2 archived by EPA without a recorded fix) and 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 3 | 0 |
| 1990s | 12 | 2 |
| 2000s | 4 | 1 |
| 2010 to October 18, 2016 | 2 | 2 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 8 | 2 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2014, Resolved.
Show all 21 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2014 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 2002 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 2002 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 2001 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 2001 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 1999 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 1998 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 1, 1997 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 1997 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 1, 1996 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 1996 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 1993 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jan 1, 1993 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jun 11, 1992 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
May 6, 1992 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Mar 19, 1992 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Dec 30, 1991 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 31, 1985 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 4, 1984 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
May 15, 1981 | Resolved |
Enforcement actions
Illinois regulators took 2 formal enforcement actions against Mount Zion between 2022 and 2024, filed as 4 records in EPA's data. The most recent was a compliance order (no penalty) in August 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 12, 2024 | Illinois | Compliance order (no penalty) | 3 violations (3 health-based): Total Trihalomethanes (TTHMs) |
| Mar 10, 2022 | Illinois | Compliance order (no penalty) | 3 violations (3 health-based): Total Trihalomethanes (TTHMs) |
What the violations mean
Total Trihalomethanes (TTHMs)
7 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Lead and Copper Rule
1 incidentThe system did not complete a treatment step or action that the Lead and Copper Rule requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Mount Zion buys its water from Decatur. It lists no wells or intakes of its own.
Buys water from
- Decatur Decatur, IL
Annual water quality report
Mount Zion must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Illinois.
Certified drinking water labs by state EPA guidance for private wells