# WaterSystemViolationPulse benchmark report

> As of 2026-11-04, WaterSystemViolationPulse holds 459 public records from U.S. EPA Safe Drinking Water Information System (SDWIS) via Envirofacts and EPA ECHO. The largest group is Microbial (coliform, E. coli, treatment technique) with 410 (89%); the median population served is $142 (middle half $50 to $864). Computed from the live dataset and updated on every refresh.

## Typical population served

- Lowest: $25
- 25th percentile: $50
- Median: $142
- 75th percentile: $864
- Highest: $75,873

## By location

| Group | Records |
|---|---|
| IN | 59 |
| PA | 48 |
| AZ | 35 |
| LA | 30 |
| MI | 28 |
| CO | 25 |
| NC | 23 |
| ID | 19 |
| AK | 17 |
| CT | 17 |
| NM | 16 |
| IL | 13 |
| MT | 11 |
| MO | 10 |
| NY | 10 |

## By category

| Group | Records |
|---|---|
| Microbial (coliform, E. coli, treatment technique) | 410 |
| Chemicals (inorganic, organic, radionuclides) | 30 |
| Disinfectants and disinfection byproducts | 17 |
| Other rule | 2 |

Source: https://zalwin.com/reports/watersystemviolationpulse-benchmark (updated 2026-11-04).