Summary of DBP Quarterly Report
The data tables summarizes the disinfection by-product results for TTHM and HAA5 from distribution sites and calculated compliance values for each quarter (a) : analyzed by EPA Method 524.3 (b) : analyzed by EPA Method 552.3 LRAA: The Locational Running Annual Average (LRAA) is calculated by taking the value of this quarter and the three previous consecutive quarters. RAA: The System-wide Running Annual Average (RAA) is calculated by taking the average of the Quarterly Average of this quarter and the three previous consecutive quarters. OEL: The Operational Evalution Level (OEL) is calculated by averaging 2 times this quarter's value and the two previous consecutive quarters. Both the LRAA and the System-wide RAA is not to exceed 80 µg/L for TTHM and 60 µg/L for HAA5.
Open in the graph · Relate this dataset · What these columns mean
Freshness
The publisher's promise
How the agency that publishes this data says it keeps the data current.
Fresh
- Says it updates
- Quarterly
- Actually updates about every
- 97.97 days
- Publisher last updated the data
- Sep 21, 2026
Our mirror
Whether our copy of this data is current with the source.
In sync
- We last synced
- Sep 21, 2026, 1:51 PM
- Rows in our copy
- 980
- Rows at the source
- 980
- Our copy trails the source by
- under a minute
Columns
Each source column, with the name and type we use to store it.
0 of 11 columns carry a concept; 0 carry a description from the publisher. Read the concept column before you join. A column with no concept carries no claim from us, and a name that looks like a key is not one.
| Source field | Display name | What the publisher says it is | Concept | Source type | Stored as | Stored type | Row identifier | Unit |
|---|---|---|---|---|---|---|---|---|
analysis_date_haa5_g_l_b | Analysis Date HAA5 (µg/L) (b) | The publisher describes this column nowhere. | Not bound | Calendar date | analysis_date_haa5_g_l_b | timestamp | — | |
analysis_date_tthm_g_l_a | Analysis Date TTHM (µg/L) (a) | The publisher describes this column nowhere. | Not bound | Calendar date | analysis_date_tthm_g_l_a | timestamp | — | |
sample_date | Sample Date | The publisher describes this column nowhere. | Not bound | Calendar date | sample_date | timestamp | — | |
location | Location | The publisher describes this column nowhere. | Not bound | Text | location | text | — | |
oel_haa5_g_l_b | OEL HAA5 (µg/L) (b) | The publisher describes this column nowhere. | Not bound | Number | oel_haa5_g_l_b | numeric | — | |
result_haa5_g_l_b | Result HAA5 (µg/L) (b) |
Download
This file was produced on Sep 21, 2026, 10:02 PM.
Refresh this dataset
Source and attribution
Where this data comes from, which version we hold, and what we changed.
- Source
- https://data.cityofnewyork.us/d/33c5-b922
- Version
- Content hash:
56d7e25aa90a7505e970ab37c17895d41de9cad76639bd97113d24e653f4726c - What we changed
- We did not change the data. We stored it as published.
- Publisher
- codenownyc
- We retrieved it
- Sep 21, 2026, 1:51 PM
Update history
| Started | Kind | Result | Rows written | Produced by |
|---|---|---|---|---|
| Sep 21, 2026, 3:26 PM | full_replace | success | 980 | codenow-nycmesh-container-oci.jfrog.io/codenow/citytap-pull:0.1.82 |
| Aug 2, 2026, 12:22 PM | full_replace | success | 960 | codenow-nycmesh-container-oci.jfrog.io/codenow/citytap-pull:0.1.27 |