Public water system record
Cedar Gulch 2
Serves an area of Pennington County, SD that includes Rapid City · 40 people served
Federal records show 16 health-based violations and 31 monitoring/reporting issues for Cedar Gulch 2 in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.
System profile
Source water
Groundwater
ZIP
57769
EPA system ID
SD4602295
- Health-based violations, last 10 years
- 16
- Resolved
- 16
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 31
Key facts
- Cedar Gulch 2 draws water from 1 well.
- Highest measured level in the last 10 years: Gross Alpha, Excl. Radon and U, 142 pCi/L, federal limit 15 pCi/L (9.5 times the limit), 2017.
- Most recent formal enforcement: compliance order (no penalty) by South Dakota, September 2015.
- Record on file since 2009, with 52 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 14 service lines.
Check whether Cedar Gulch 2 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 |
|---|---|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
340 | Jul 1, 2018 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 109 pCi/L, federal limit 15 pCi/L (7.3 times the limit)
|
340 | Jul 1, 2018 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 106 pCi/L, federal limit 15 pCi/L (7.1 times the limit)
|
340 | Apr 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
340 | Apr 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
340 | Jan 1, 2018 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 112 pCi/L, federal limit 15 pCi/L (7.5 times the limit)
|
340 | Jan 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 31 pCi/L, federal limit 5 pCi/L (6.2 times the limit)
|
340 | Oct 1, 2017 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 118 pCi/L, federal limit 15 pCi/L (7.9 times the limit)
|
340 | Oct 1, 2017 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 130 pCi/L, federal limit 15 pCi/L (8.7 times the limit)
|
340 | Jul 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
340 | Jul 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
340 | Apr 1, 2017 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 141 pCi/L, federal limit 15 pCi/L (9.4 times the limit)
|
340 | Apr 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 33 pCi/L, federal limit 5 pCi/L (6.6 times the limit)
|
340 | Jan 1, 2017 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 142 pCi/L, federal limit 15 pCi/L (9.5 times the limit)
|
340 | Jan 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
340 | Oct 1, 2016 | Resolved | No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 127 pCi/L, federal limit 15 pCi/L (8.5 times the limit)
|
340 | Oct 1, 2016 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Diquat
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Glyphosate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Endothall
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
2,4-D
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Picloram
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Pentachlorophenol
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
2,4,5-TP
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Dinoseb
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Dalapon
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Simazine
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Chlordane
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Endrin
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
LASSO
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2016 | Resolved |
Full record since 2009
EPA's records for Cedar Gulch 2 go back to 2009. Before October 19, 2016 they list 52 health-based violations (52 resolved) and 41 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 1 |
| 2010 to October 18, 2016 | 52 | 40 |
| October 19, 2016 to 2019 | 14 | 29 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began October 2016, Resolved.
Show all 52 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
Oct 1, 2016 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 127 pCi/L, federal limit 15 pCi/L (8.5 times the limit)
|
Oct 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 30 pCi/L, federal limit 5 pCi/L (6 times the limit)
|
Jul 1, 2016 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 104 pCi/L, federal limit 15 pCi/L (6.9 times the limit)
|
Jul 1, 2016 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 78 pCi/L, federal limit 15 pCi/L (5.2 times the limit)
|
Apr 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 28 pCi/L, federal limit 5 pCi/L (5.6 times the limit)
|
Apr 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 25 pCi/L, federal limit 5 pCi/L (5 times the limit)
|
Jan 1, 2016 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 57 pCi/L, federal limit 15 pCi/L (3.8 times the limit)
|
Jan 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 24 pCi/L, federal limit 5 pCi/L (4.8 times the limit)
|
Oct 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 46 pCi/L, federal limit 15 pCi/L (3.1 times the limit)
|
Oct 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 27 pCi/L, federal limit 5 pCi/L (5.4 times the limit)
|
Jul 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 46 pCi/L, federal limit 15 pCi/L (3.1 times the limit)
|
Jul 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 25 pCi/L, federal limit 5 pCi/L (5 times the limit)
|
Apr 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 52 pCi/L, federal limit 15 pCi/L (3.5 times the limit)
|
Apr 1, 2015 | Resolved |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
Feb 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 27 pCi/L, federal limit 5 pCi/L (5.4 times the limit)
|
Jan 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 56 pCi/L, federal limit 15 pCi/L (3.7 times the limit)
|
Jan 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 63 pCi/L, federal limit 15 pCi/L (4.2 times the limit)
|
Oct 1, 2014 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 30 pCi/L, federal limit 5 pCi/L (6 times the limit)
|
Oct 1, 2014 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 29 pCi/L, federal limit 5 pCi/L (5.8 times the limit)
|
Jul 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 66 pCi/L, federal limit 15 pCi/L (4.4 times the limit)
|
Jul 1, 2014 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 32 pCi/L, federal limit 5 pCi/L (6.4 times the limit)
|
Apr 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 74 pCi/L, federal limit 15 pCi/L (4.9 times the limit)
|
Apr 1, 2014 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 30 pCi/L, federal limit 5 pCi/L (6 times the limit)
|
Jan 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 72 pCi/L, federal limit 15 pCi/L (4.8 times the limit)
|
Jan 1, 2014 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 28 pCi/L, federal limit 5 pCi/L (5.6 times the limit)
|
Oct 1, 2013 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 77 pCi/L, federal limit 15 pCi/L (5.1 times the limit)
|
Oct 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 28 pCi/L, federal limit 5 pCi/L (5.6 times the limit)
|
Jul 1, 2013 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 79 pCi/L, federal limit 15 pCi/L (5.3 times the limit)
|
Jul 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 27 pCi/L, federal limit 5 pCi/L (5.4 times the limit)
|
Apr 1, 2013 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 67 pCi/L, federal limit 15 pCi/L (4.5 times the limit)
|
Apr 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 29 pCi/L, federal limit 5 pCi/L (5.8 times the limit)
|
Jan 1, 2013 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 73 pCi/L, federal limit 15 pCi/L (4.9 times the limit)
|
Jan 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 29 pCi/L, federal limit 5 pCi/L (5.8 times the limit)
|
Oct 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 67 pCi/L, federal limit 15 pCi/L (4.5 times the limit)
|
Oct 1, 2012 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Oct 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 29 pCi/L, federal limit 5 pCi/L (5.8 times the limit)
|
Jul 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 65 pCi/L, federal limit 15 pCi/L (4.3 times the limit)
|
Jul 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 22 pCi/L, federal limit 5 pCi/L (4.4 times the limit)
|
Apr 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 52 pCi/L, federal limit 15 pCi/L (3.5 times the limit)
|
Apr 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 15 pCi/L, federal limit 5 pCi/L (3 times the limit)
|
Jan 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 31 pCi/L, federal limit 15 pCi/L (2.1 times the limit)
|
Jan 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
|
Oct 1, 2011 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Sep 1, 2011 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Feb 1, 2011 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Dec 1, 2010 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Nov 1, 2010 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2010 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Aug 1, 2010 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Aug 1, 2010 | Resolved |
2 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
South Dakota regulators took 2 formal enforcement actions against Cedar Gulch 2 between 2010 and 2015, filed as 74 records in EPA's data. The most recent was a compliance order (no penalty) in September 2015.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 29, 2015 | South Dakota | Compliance order (no penalty) | 42 violations (42 health-based): Combined Radium (-226 and -228), Gross Alpha, Excl. Radon and U |
| Oct 5, 2010 | South Dakota | Compliance order (no penalty) | 32 violations (32 health-based): Combined Radium (-226 and -228), Gross Alpha, Excl. Radon and U, Total Coliform, Groundwater Rule, Stage 1 Disinfection Byproducts Rule |
What the violations mean
Combined Radium (-226 and -228)
8 incidentsTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Gross Alpha, Excl. Radon and U
8 incidentsTest results for Gross Alpha, Excl. Radon and U were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Cedar Gulch 2 draws water from 1 well.
Annual water quality report
Cedar Gulch 2 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 Cedar Gulch 2 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 South Dakota.
Certified drinking water labs by state EPA guidance for private wells