Forensic evidence record · ev-nm3520203-f-roswell-tthm
Total trihalomethanes (TTHM)
A single published measurement record with its qualifier, sampling context, source identifier, method note, and stated limitations kept together.
Published evidence record
4.7 ppbReported measurementMeasurement evidence
- Analyte
- Total trihalomethanes (TTHM)
- Result qualifier
- =
- Reference basis
- 80 ppb federal MCL
- Sampling location
- Distribution System Tap
- Water system ID
- NM3520203
- Source ID
- src-ccr
Laboratory context
No laboratory method note was published with this record.
Sampling context
This result represents a distribution system tap sample. It does not establish the condition at every distribution point or household tap.
Record limitation
A compliance summary across sampled distribution-system or household-tap locations; it does not describe the water at any single tap.
Source provenance
Consumer Confidence Report (CCR)
Utility Consumer Confidence Reports (CCR) — disinfection by-products and hardness
Individual public water utilities · Published 2025
Annual CCRs published by utilities carry hardness, disinfectant type and additional analytes (for example HAA5 and TTHM) that federal datasets do not always include.
How to interpret this record
This page preserves one measurement. Interpretation requires its qualifier, reporting limit, reference basis, date, sampling location, and limitations; the number alone is not a safety verdict.
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