Contaminant 4010
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 4010).
PWSID IA5200802 · GroundwaterPrivate
60 people served. 8 health-based SDWIS violations recorded in the past 5 years. 8 remain unresolved. Last cited 1 year ago.
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 4010).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 4010).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 4010).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 4010).
Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Iowa City, Iowa (Census place; block-group disparity scores aggregated by centroid containment): a service population of 74,878. Local disparity score for pm2.5 (fine particulate) sits near the reference (104). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 104 | near the reference |
| Ozone | 60 | below the reference |
| Nitrogen dioxide (NO₂) | 83 | below the reference |
| Diesel particulate | 72 | below the reference |
| Toxic releases (RSEI) | 101 | near the reference |
| Traffic proximity | 112 | moderately above the reference |
| Lead-paint risk (pre-1960 housing) | 62 | below the reference |
| Superfund site proximity | 130 | moderately above the reference |
| RMP-facility proximity | 129 | moderately above the reference |
| Hazardous-waste site proximity | 81 | below the reference |
| Underground storage tanks | 92 | near the reference |
| NPDES wastewater proximity | 51 | below the reference |
| Drinking-water non-compliance | 0 | well below the reference |
Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).
Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2021-01-01 → 2026-05-07.
What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.