Water report · not indexed
What is in the water at 95358
2 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
STORER TRANSPORTATION
PWSID CA5000372 · CA
PFAS and lithium
Sampled, nothing detected. Tested for 30 compounds under UCMR 5 with none found at or above its reporting limit. A reporting limit is the lowest concentration the method can measure, so this means “below that” rather than “zero”.
Health-based violations
22 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- MCL · contaminant code 1040 · began 2018-01-01
- MCL · contaminant code 1040 · began 2018-07-01
- MCL · contaminant code 1040 · began 2018-10-01
- MCL · contaminant code 1040 · began 2019-01-01
- MCL · contaminant code 1040 · began 2019-04-01
- MCL · contaminant code 1040 · began 2019-07-01
- MCL · contaminant code 1040 · began 2019-10-01
- MCL · contaminant code 1040 · began 2020-01-01
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
MODESTO, CITY OF
PWSID CA5010010 · CA · serves 218,771 people
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 68 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 21 µg/L | 13 | 5/16/2024 |
| PFOS | 0.026 µg/L | 15 | 9/12/2024 |
| PFHxS | 0.0093 µg/L | 13 | 9/12/2024 |
| PFOA | 0.0086 µg/L | 8 | 9/12/2024 |
| PFPeA | 0.0067 µg/L | 8 | 9/12/2024 |
| PFHxA | 0.0061 µg/L | 8 | 9/12/2024 |
| PFBS | 0.0043 µg/L | 2 | 9/12/2024 |
| PFHpA | 0.0036 µg/L | 1 | 8/28/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Median hardness 272 mg/L as CaCO₃, measured at 3 stations serving this system across 6 results, 2015-08-04 to 2021-04-13. Measured in the water source and distribution area, not at a tap, and not in your home.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01.