Public water system record
Plymouth Water District
Serves an area of Benton County, WA · 288 people served
Federal records show 6 health-based violations and 23 monitoring/reporting issues for Plymouth Water District in the last ten years. The most serious issue in this window was a resolved Nitrate violation.
System profile
- Health-based violations, last 10 years
- 6
- Resolved
- 6
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 23
Key facts
- Plymouth Water District draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Nitrate, 14 mg/L, federal limit 10 mg/L (1.4 times the limit), 2017.
- Most recent formal enforcement: signed compliance agreement by Washington, April 1996.
- Record on file since 1979, with 10 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 17 unknown out of 132 service lines.
Check whether Plymouth Water District serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 11.6 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jan 1, 2020 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12.2 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jan 1, 2019 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jan 1, 2018 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 13.6 mg/L, federal limit 10 mg/L (1.4 times the limit)
|
330 | Jan 1, 2018 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
|
330 | Jan 1, 2017 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11.4 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jan 1, 2016 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Styrene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Toluene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Benzene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2016 | Resolved |
Full record since 1979
EPA's records for Plymouth Water District go back to 1979. Before October 19, 2016 they list 10 health-based violations (2 resolved, 8 archived by EPA without a recorded fix) and 186 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 7 | 12 |
| 2000s | 1 | 147 |
| 2010 to October 18, 2016 | 2 | 26 |
| October 19, 2016 to 2019 | 4 | 0 |
| 2020s | 1 | 22 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began April 2016, Resolved.
Show all 10 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Apr 1, 2016 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11.4 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jan 1, 2016 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2000 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1995 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1993 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1992 | Archived |
Enforcement actions
Washington regulators took 2 formal enforcement actions against Plymouth Water District between 1992 and 1996. The most recent was a signed compliance agreement in April 1996.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Apr 26, 1996 | Washington | Signed compliance agreement | 7 violations (2 health-based): Total Coliform |
| Nov 23, 1992 | Washington | Signed compliance agreement | 6 violations (1 health-based): Total Coliform |
What the violations mean
Nitrate
6 incidentsNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Where the water comes from
Plymouth Water District draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Plymouth Water District must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Plymouth Water District for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Washington.
Certified drinking water labs by state EPA guidance for private wells