Lime Creek IA 02-CED-524
mouth (SW 1/4 S4 T86N R10W Benton Co.) to confluence with unnamed tributary in S1 T87N R10W Buchanan Co.
- Cycle
- 2026
- Current Phase
- Public Comment
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Declining
- Trend Comment
- Benthic macroinvertebrate (BMIBI) scores have a downward trend.
- Created
- 10/27/2025 3:09:26 PM
- Updated
- 2/5/2026 9:23:25 AM
The presumptive Class A1 use remains assessed as "not supported" due to levels of indicator bacteria (E. coli) that violated state water quality criteria. The Class BWW1 use was assessed as "WINOFI" based on biological sampling data and continuous monitoring data. All other designated uses were "not assessed."
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description CRWQ 23 WQ CY 2022-2024 99990091 Lime
Creek
Iowa DNR 6 WQ CY 2022-2024 12100002 Lime
Creek-Lime Creek Park- Brandon
Iowa DNR 6 BIO See Below 154 Lime Creek Lime Creek Park-
Brandon Site ID Data Source ID # Samples per Year (2022/ 2023/2024) 2022 Geometric Mean 2023 Geometric Mean 2024 Geometric Mean Violates Annual Geometric Mean? # 2022 SSM violations / SSM Violations needed for impairment # 2023 SSM violations / SSM Violations needed for impairment # 2024 SSM violations / SSM Violations needed for impairment Violates Annual SSM Significantly >10% Rule? Assessment Type Support Level 99990091 23 5/5/5 332 279 827 YES 4 / NA 4 / NA 4 / NA YES EVALUATED NOT 99990091 23 5/5/5 332 279 827 YES 0 / NA 0 / NA 1 / NA NO EVALUATED NOT Site ID Data Source ID # Samples / # Years Minimum Value Maximum Value Mean Value # Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 12100002 6 35 / 3 7.3 8.2 7.7 0 7 NO MONITORED FULL 99990091 23 15 / 3 7.5 8.5 8.1 0 4 NO MONITORED FULL Site ID Data Source ID Parameter Name # Samples / # Years Minimum Value Maximum Value Mean Value # Violations # Acute / Chronic Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 12100002 6 Chloride 9 / 3 21 25 23 NA 0 / 0 3 NO EVALUATED FULL 99990091 23 Chloride 15 / 3 21.8 46.7 28.2 NA 0 / 0 4 NO MONITORED FULL 12100002 6 Dissolved Oxygen 35 / 3 2.5 13 8 4 NA / NA 7 NO MONITORED FULL 99990091 23 Dissolved Oxygen 11 / 3 5.6 16.4 9.2 0 NA / NA 3 NO MONITORED FULL 12100002 6 pH 35 / 3 7.3 8.2 7.7 0 NA / NA 7 NO MONITORED FULL 99990091 23 pH 15 / 3 7.5 8.5 8.1 0 NA / NA 4 NO MONITORED FULL 12100002 6 Sulfate 9 / 3 12 88 25 0 NA / NA 3 NO MONITORED FULL 99990091 23 Sulfate 15 / 3 10.3 21.5 17 0 NA / NA 4 NO MONITORED FULL 12100002 6 Temperature 35 / 3 6.1 26.3 16.9 0 NA / NA 7 NO MONITORED FULL 99990091 23 Temperature 15 / 3 5.6 26.5 18 0 NA / NA 4 NO MONITORED FULL Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 12100002 6 Ammonia 20 / 3 1.5 0.1 0.02 0 / 0 NO MONITORED FULL Benthic Macroinvertebrates: Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47c BMIBI BIT BMIBI Pass/Fail 154 10/7/24 32.5 47c MS Surber 59 Good 70 Fail 154 8/29/24 32.5 47c MS Surber 60 Good 70 Fail 154 7/31/24 32.5 47c MS Hess 58 Good 70 Fail 154 10/5/23 32.5 47c MS Surber 62 Good 70 Fail 154 8/24/23 32.5 47c MS Surber 78 Excellent 70 Pass 154 7/27/23 32.5 47c MS Hess 77 Excellent 70 Pass 154 9/12/22 32.5 47c MS Hess 68 Good 70 Fail 154 7/26/22 32.5 47c MS Hess 80 Excellent 70 Pass 154 7/19/21 32.5 47c MS Hess 80 Excellent 70 Pass 154 9/23/20 32.5 47c MS Hess 75 Good 70 Pass Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47c FIBI BIT FIBI Pass/Fail 154 10/7/24 32.5 47c MS Yes 77 Excellent 65 Pass 154 8/24/23 32.5 47c MS Yes 84 Excellent 65 Pass 154 9/12/22 32.5 47c MS Yes 87 Excellent 65 Pass 154 7/19/21 32.5 47c MS Yes 81 Excellent 65 Pass 154 9/23/20 32.5 47c MS Yes 90 Excellent 65 Pass Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (5/10) WINOFI Fish Monitored Pass (5/5) Full Assessment was evaluated because the benthic Overall Evaluated Fail WINOFI 3bc macroinvertebrate assessment was inconclusive. Site ID Data Source ID # Days Monitoring
(2022/2023) DO Criteria Type # 2022 Violations/Violations
needed for impairment # 2023 Violations/Violations
needed for impairment Violates Annual
Significantly >10% Rule? Assessment Type Support Level 24 hr 2/25 31/20 Yes 12100002 6 191/16 16 hr 0/25 6/20 No Monitored WINOFI
Presumptive Class A1 - Indicator Bacteria:
Presumptive Class A1 - pH:
Class BWW1 - Binomial Parameters:
Class BWW1 - Toxic Parameters:
Class BWW1 -
Biological Sampling:
Fish:
Overall:
Class BWW1- Continuous DO Monitoring:
Class HH - No Data