Community Water System · PWS IL1115080
Johnsburg No.2
Operator location Johnsburg, Illinois - upper-third violation load (> 74 violations) with 157 EPA violations; groundwater source; 1,124 served (PWS-level, not municipal population).
- 1,124
- People served (this PWS)
- 157
- EPA violations (this PWS)
- 19
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Johnsburg No.2 standing, high SDWIS violation third
157 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 12% is middle-third health share (≤ 23%). Population rank #18,418 of 29,740 among systems serving 500+.
The verdict
Johnsburg No.2 sits in the upper third of the sitemap cohort by violation count (157), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,124 (mid served population (≤ 3,309)). Health-based share is 12% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #18,418 of 29,740
- Population · /systems
- #824 of 1,310
- Population · IL
- 157
- Total EPA violations on record
- 12%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 349
- County
- McHenry
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 97
- Treatment Tech Violations
- 7
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 12 | 2009 |
| Combined Radium (-226 and -228) | MCL | 12 | 2007 |
| Nitrate | MR | 8 | 2007 |
| Lead and Copper Rule | MR | 8 | 2019 |
| Public Notice | Other | 8 | 2018 |
| TTHM | MR | 8 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2023 |
| Consumer Confidence Rule | Other | 8 | 2024 |
| Lead and Copper Rule | TT | 7 | 1996 |
| Combined Radium (-226 and -228) | MR | 6 | 2007 |
| Chlorine | MR | 6 | 2009 |
| Toluene | MR | 6 | 2008 |
| p-Dichlorobenzene | MR | 4 | 1991 |
| 1,1-Dichloroethylene | MR | 4 | 1991 |
| 1,2-Dichloroethane | MR | 4 | 1991 |
| 1,1,1-Trichloroethane | MR | 4 | 1991 |
| Trichloroethylene | MR | 4 | 1991 |
| Benzene | MR | 4 | 1991 |
| Carbon tetrachloride | MR | 4 | 1991 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2007 |
| Chlordane | MR | 2 | 2014 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
Violation Count vs. the National Corpus
Johnsburg No.2 has 157 recorded EPA violations, 82% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 18% carry more. 12% of this system's own violations are health-based (19 of 157), and it ranks #18,418 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
157 Higher than most more violations than 82% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
SDWIS compliance record for Johnsburg No.2
157 violations on record for IL1115080; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS · Illinois EPA, Bureau of Water
Nationwide peers
157 violations · 1,124 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Johnsburg No.2
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Illinois compares on the same EPA violation measures. Illinois systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.