Original research
The standard is 24 hours. The measured median is 9 days.
HPD classes an active heat or hot water outage as Class C, immediately hazardous, the shortest correction window the housing code sets: 24 hours. Of 148,225 Class C heat and hot water violations on the record, 72,598, 49.0%, have ever been certified corrected. Among those, correction took a median of 9 days and a 90th percentile of 15 days. 47,488 have sat open more than a year with no certification on file.
49.0% of Class C heat and hot water violations have ever been certified corrected; 47,488 have been open more than a year with none on file.
The comparison, stated plainly
The median and the 90th percentile above are computed only among the 72,598 Class C violations that carry a certified-corrected date: a completion time cannot be measured on a violation that has not yet completed. The 75,627 still uncertified, including the 47,488 open more than a year, are a separate, larger figure, shown above rather than folded into the same average.
By class
Class C is 94.3% of every heat and hot water violation HPD has issued. The other two classes carry longer correction windows and are not subject to the 24-hour standard above.
| Class | Violations | Share of all-time total |
|---|---|---|
| C (24-hour window) | 148,225 | 94.3% |
| B (30-day window) | 6,347 | 4.0% |
| A (90-day window) | 2,635 | 1.7% |
Year over year
The certification rate has held close to half in every year on our working copy of the record, not drifted up or down with volume. 2026 is a partial year, since the record runs through August 27, 2026.
| Year | Class C violations | Ever certified corrected |
|---|---|---|
| 2023 | 19,305 | 48.5% |
| 2024 | 43,713 | 49.2% |
| 2025 | 51,130 | 48.3% |
| 2026 (partial year) | 34,077 | 50.1% |
How this is counted
Violations whose HPD description text matches "heat" or "hot water" (case-insensitive), the same definition already used for the Heat and Hot Water category elsewhere on this site. A text match, not an exact statute classification. Every year on record (2023-present) is summed into the twelve month buckets above; the year-by-year shape behind that sum is broken out below.
148,225 Class C heat and hot water violations, pulled August 29, 2026, covering inspections recorded July 30, 2023 through August 27, 2026. Measured against 2,908,403 total HPD violation rows in our working copy of the record as of August 27, 2026: heat and hot water violations are 5.4% of every violation HPD has on file. The full monthly pattern behind these violations is on the seasonal-spike page. This season, live, the citywide record, ViolationScout.