Twin Falls Water Quality
Idaho
According to EPA SDWIS, Twin Falls, Idaho is served by 3 community water systems covering about 56,296 people. The same extract lists 18 health-based violation records, most recently coded 5200 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Twin Falls, Idaho is delivered through 3 EPA-regulated community water systems serving an estimated 56,296 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 18 violation records across the 3 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 5 distinct EPA contaminant codes: LEAD AND COPPER RULE REVISIONS, Arsenic, Groundwater Rule, Revised Total Coliform Rule, Coliform (TCR). 7 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Idaho drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| TWIN FALLS CITY OF | 56,121 | 0 | Clean |
| MEANDER POINT SUBD | 140 | 12 | Health |
| RIVERSIDE TRAILER COURT | 35 | 6 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| MEANDER POINT SUBD | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MEANDER POINT SUBD | Arsenic | 2022-04-01 |
| MEANDER POINT SUBD | Arsenic | 2022-04-01 |
| MEANDER POINT SUBD | Arsenic | 2022-01-01 |
| MEANDER POINT SUBD | Arsenic | 2020-07-01 |
| MEANDER POINT SUBD | Groundwater Rule | 2020-06-01 |
| MEANDER POINT SUBD | Groundwater Rule | 2020-06-01 |
| MEANDER POINT SUBD | Arsenic | 2020-01-01 |
| MEANDER POINT SUBD | Arsenic | 2019-10-01 |
| MEANDER POINT SUBD | Arsenic | 2019-07-01 |
| MEANDER POINT SUBD | Arsenic | 2019-04-01 |
| MEANDER POINT SUBD | Arsenic | 2019-01-01 |
| RIVERSIDE TRAILER COURT | Groundwater Rule | 2017-09-15 |
| RIVERSIDE TRAILER COURT | Revised Total Coliform Rule | 2016-05-20 |
| RIVERSIDE TRAILER COURT | Coliform (TCR) | 2016-03-01 |
| RIVERSIDE TRAILER COURT | Coliform (TCR) | 2015-03-01 |
| RIVERSIDE TRAILER COURT | Coliform (TCR) | 2015-02-01 |
| RIVERSIDE TRAILER COURT | Coliform (TCR) | 2014-08-01 |
What are Twin Falls's health-based records for?
Twin Falls's health-based violation records carry 5 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Arsenic | 9 | 1 |
| Coliform (TCR) | 4 | 1 |
| Groundwater Rule | 3 | 2 |
| Lead and Copper Rule Revisions | 1 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
TRI Facilities in Twin Falls
| Facility | Total Releases |
|---|---|
| Amalgamated Sugar Co | 2.4M lbs |
| Glanbia Foods Inc | 485.0K lbs |
| Lamb Weston Inc | 90.8K lbs |
| Lippert Components - Twin Falls #64 | 5.8K lbs |
| Chobani Idaho | 2.7K lbs |
| Twin Falls Redi-Mix | 288 lbs |
| Jd Heiskell & Co | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Twin Falls, Idaho? ▼
How many water violations does Twin Falls have in this EPA extract? ▼
What contaminants were found in Twin Falls water? ▼
How many water systems serve Twin Falls? ▼
Where does Twin Falls get its drinking water? ▼
Are there pollution sources near Twin Falls? ▼
How does Twin Falls compare in Idaho?
Of the 216 Idaho places with at least one community water system on file, Twin Falls ranks #63 by number of systems (3).
Either side of it: Rupert (3), Sugar City (3), Wallace (3), Ammon (2)
About This Data
Figures here are the current EPA SDWIS extract joined to the 3 community water systems whose service area lists Twin Falls, ranked against the 216 Idaho places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.