RYDERWOOD IMPROVEMENT & SERVICE AS
PWS ID: WA5375100 · Kelso, Washington 98626
Population Served
434
Total Violations
95
Health-Based Violations
11
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 290
- County
- Cowlitz
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 75
- Treatment Tech Violations
- 11
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 11 | 2008 |
| Fluoride | MR | 4 | 2002 |
| Mercury | MR | 4 | 2002 |
| Nickel | MR | 4 | 2002 |
| Selenium | MR | 4 | 2002 |
| Beryllium, Total | MR | 4 | 2002 |
| Thallium, Total | MR | 4 | 2002 |
| Surface Water Treatment Rule | MR | 4 | 2022 |
| Barium | MR | 4 | 2002 |
| Chromium | MR | 4 | 2002 |
| CYANIDE | MR | 4 | 2002 |
| Cadmium | MR | 4 | 2002 |
| Antimony, Total | MR | 4 | 2002 |
| Consumer Confidence Rule | Other | 2 | 2024 |
| Carbon tetrachloride | MR | 1 | 2007 |
| BHC-GAMMA | MR | 1 | 1979 |
| 1,2-Dichloropropane | MR | 1 | 2007 |
| Tetrachloroethylene | MR | 1 | 2007 |
| Methoxychlor | MR | 1 | 1979 |
| 1,1-Dichloroethylene | MR | 1 | 2007 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2007 |
| Ethylbenzene | MR | 1 | 2007 |
| Styrene | MR | 1 | 2007 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Toxaphene | MR | 1 | 1979 |
| trans-1,2-Dichloroethylene | MR | 1 | 2007 |
| Toluene | MR | 1 | 2007 |
| DICHLOROMETHANE | MR | 1 | 2007 |
| o-Dichlorobenzene | MR | 1 | 2007 |
| 2,4,5-TP | MR | 1 | 1979 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.