Public water system record
Mill Creek Water Dept
Serves an area of Randolph County, WV that includes Mill Creek · 591 people served
Federal records show 15 health-based violations and 191 monitoring/reporting issues for Mill Creek Water Dept in the last ten years, including an unresolved Long Term 2 Enhanced Surface Water Treatment Rule violation.
System profile
Source water
Surface water
ZIP
26280
EPA system ID
WV3304209
- Health-based violations, last 10 years
- 15
- Resolved
- 10
- Unresolved
- 5
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 191
Key facts
- Mill Creek Water Dept draws water from 1 surface water intake.
- Most recent enforcement action: boil water order by West Virginia, June 2008.
- Record on file since 1994, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 397 service lines.
Check whether Mill Creek Water Dept 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 |
|---|---|---|---|---|
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 13, 2025 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 13, 2025 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 13, 2025 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 13, 2025 | Active | No |
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Aug 13, 2024 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | May 10, 2024 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Feb 8, 2024 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | May 1, 2022 | Resolved | Yes |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2022 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 12, 2022 | Active | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2022 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2021 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2021 | Active | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 31, 2019 | Active | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2017 | Active | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Public Notice
OTHER
|
Dec 15, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2024 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2024 | Active |
|
Public Notice
OTHER
|
Jun 13, 2024 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2024 | Resolved |
|
Public Notice
OTHER
|
May 15, 2024 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Mar 31, 2024 | Active |
|
Public Notice
OTHER
|
Feb 16, 2024 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2024 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2024 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2024 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2024 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Public Notice
OTHER
|
Nov 15, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Aug 13, 2023 | Resolved |
|
Public Notice
OTHER
|
Aug 13, 2023 | Resolved |
|
Public Notice
OTHER
|
Aug 13, 2023 | Resolved |
|
Public Notice
OTHER
|
Aug 13, 2023 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Public Notice
OTHER
|
May 14, 2023 | Resolved |
|
Public Notice
OTHER
|
May 14, 2023 | Resolved |
|
Public Notice
OTHER
|
May 14, 2023 | Resolved |
|
Public Notice
OTHER
|
Apr 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Apr 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Mar 25, 2023 | Resolved |
|
Public Notice
OTHER
|
Mar 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 15, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 15, 2023 | Resolved |
|
Public Notice
OTHER
|
Jan 14, 2023 | Resolved |
|
Public Notice
OTHER
|
Jan 14, 2023 | Resolved |
|
Public Notice
OTHER
|
Jan 14, 2023 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Dec 16, 2022 | Resolved |
|
Public Notice
OTHER
|
Dec 16, 2022 | Resolved |
|
Public Notice
OTHER
|
Nov 16, 2022 | Resolved |
|
Public Notice
OTHER
|
Nov 16, 2022 | Resolved |
|
Public Notice
OTHER
|
Nov 12, 2022 | Resolved |
|
Public Notice
OTHER
|
Nov 12, 2022 | Resolved |
|
Public Notice
OTHER
|
Oct 15, 2022 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Sep 12, 2022 | Resolved |
|
Public Notice
OTHER
|
Aug 14, 2022 | Resolved |
|
Public Notice
OTHER
|
Aug 13, 2022 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Jun 13, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2022 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2022 | Resolved |
|
Public Notice
OTHER
|
May 14, 2022 | Resolved |
|
Public Notice
OTHER
|
May 14, 2022 | Resolved |
|
Public Notice
OTHER
|
Apr 15, 2022 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Mar 18, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Jan 16, 2022 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Dec 16, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Nov 14, 2021 | Resolved |
|
Public Notice
OTHER
|
Nov 14, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2021 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2021 | Active |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Active |
|
Public Notice
OTHER
|
Jun 16, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jun 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Mar 15, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2021 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Sep 1, 2020 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Sep 1, 2020 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Sep 1, 2020 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2020 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Mar 1, 2020 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Chlordane
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
2,4-D
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
LASSO
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Picloram
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Simazine
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Nov 12, 2017 | Resolved |
|
Public Notice
OTHER
|
Nov 12, 2016 | Resolved |
|
Public Notice
OTHER
|
Nov 12, 2016 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
Full record since 1994
EPA's records for Mill Creek Water Dept go back to 1994. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 133 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 2 |
| 2000s | 2 | 86 |
| 2010 to October 18, 2016 | 0 | 45 |
| October 19, 2016 to 2019 | 2 | 6 |
| 2020s | 13 | 184 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began March 2005, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2005 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2004 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 1995 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 1995 | Resolved |
Enforcement actions
West Virginia regulators issued 6 boil water orders to Mill Creek Water Dept between 2002 and 2008. The most recent was a boil water order in June 2008.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 12, 2008 | West Virginia | Boil water order | 1 violation |
| May 5, 2008 | West Virginia | Boil water order | 1 violation |
| Apr 16, 2008 | West Virginia | Boil water order | 1 violation |
| Mar 27, 2005 | West Virginia | Boil water order | 1 violation |
| Jul 27, 2004 | West Virginia | Boil water order | 1 violation |
| Jan 25, 2002 | West Virginia | Boil water order | 1 violation |
What the violations mean
Long Term 2 Enhanced Surface Water Treatment Rule
8 incidentsThe system failed required surface water treatment or filtration standards
Untreated or inadequately treated surface water can contain bacteria and viruses
CARBON, TOTAL
3 incidentsThe system did not complete a treatment step or action that federal rules require for CARBON, TOTAL (a treatment technique violation).
The utility had to notify customers about each of these violations.
Stage 1 Disinfection Byproducts Rule
2 incidentsThe system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule
Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Interim Enhanced Surface Water Treatment Rule
1 incidentThe system did not meet a filtration or treatment requirement for surface water
Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through
Where the water comes from
Mill Creek Water Dept draws water from 1 surface water intake. 1 other community water system buys water from Mill Creek Water Dept.
Community systems that buy water from it
- Town of Huttonsville Huttonsville, WV
Annual water quality report
Mill Creek Water Dept 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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 West Virginia.
Certified drinking water labs by state EPA guidance for private wells