Healthy Central Valley Together Update
Last compiled on 07/09/2024
Please see below for the latest update on Merced, Stanislaus, and Yolo County wastewater data.
Aggregated trend lines for counties are calculated using the right-aligned 10-day trimmed average for each site (\(\text{trimmed } target/PMMoV\)). For each date, an individual site trimmed smoothed value, i, for the day t (\(\text{trimmed } target/PMMoV_{i,t}\)) is multiplied by the plant’s population, \(pop_i\). Then these are summed and divided by the total population of all selected sites. This calculation results in the trimmed weighted average \(\text{county } target/PMMoV_{t}\) for day t, as in the following equation for the m selected plants: \[\text{county } target/PMMoV_{t} = \frac {\sum_{i=1}^m pop_i \times \text{trimmed } target/PMMoV_{i,t}}{\sum_{i=1}^m pop_i}\]
| Percent change | |||
| Virus | Merced County | Stanislaus County | Yolo County |
|---|---|---|---|
| SARS-CoV-2 | +60.6% | -19.3% | +9.4% |
| Norovirus | +26.9% | -12.5% | -5.8% |
| Rotavirus | +14.4% | -52.7% | -22.3% |
| Parainfluenza | NA | NA | NA |
| Enterovirus D68 | ND | ND | ND |
| Hepatitis A Virus | ND | ND | -30.5% |
| Candida auris | ND | ND | ND |
| RSV | ND | ND | ND |
| HMPV | -52.8% | -29.2% | -56.2% |
| Influenza A | +92.8% | ND | +320% |
| Influenza B | -4.7% | +126% | +35.4% |
| Percent change is calculated here using the average of measurements over the past two weeks compared to the average of measurements from the prior two weeks. Results below the limit of detection are included in the averages as half the limit of detection. | |||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | |||
| NA: if the above criteria is not met and there were no data available in the last 7 days. | |||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | |||
| ND: Non-detect (i.e., below the limit of detection) if there were no detections in the last 14 days. | |||
| +LL: increasing but at low levels. If the above criteria is met but there were no positive detections or no data in the prior 14 days. | |||
| +Sharply: percent change is greater than 500%. | |||
| Current wastewater level | |||
| Virus | Merced | Stanislaus | Yolo |
|---|---|---|---|
| SARS-CoV-2 | High | Medium | High |
| Norovirus | High | High | High |
| Rotavirus | Low | Low | Medium |
| Parainfluenza | Low | Low | Low |
| Enterovirus D68 | Low | Low | Low |
| Hepatitis A Virus | Low | Low | Low |
| Candida auris | Low | Low | Low |
| RSV | Low | Low | Low |
| HMPV | Low | Low | Low |
| Influenza A | Low | Low | Low |
| Influenza B | Low | Low | Low |
| For non-seasonal pathogens, the boundaries of the low, medium, and high labels are defined as the tertiles of all data available for that pathogen within a given site or county. | |||
| For seasonal pathogens, the boundaries of the low, medium, and high labels are defined as the thirds of the 95th percentile value for all of the data available for that pathogen within a given site or county. | |||
| If there have not been at least one positive sample in the last 7 days and at least three positive samples in the last 14 days, a low categorization is assigned. | |||
| Mann-Kendall trend test | |||
| Virus | Merced County | Stanislaus County | Yolo County |
|---|---|---|---|
| SARS-CoV-2 | No Trend | Very likely downward | Very likely downward |
| Norovirus | No Trend | Very likely downward | Very likely downward |
| Rotavirus | No Trend | Very likely downward | Very likely downward |
| Parainfluenza | NA | NA | NA |
| Enterovirus D68 | No Trend | No Trend | No Trend |
| Hepatitis A Virus | No Trend | No Trend | Very likely downward |
| Candida auris | No Trend | No Trend | No Trend |
| RSV | No Trend | No Trend | No Trend |
| HMPV | No Trend | Very likely downward | Likely downward |
| Influenza A | No Trend | No Trend | Very likely upward |
| Influenza B | No Trend | No Trend | Very likely downward |
| Week 141: 06/23 - 07/06 | |||
| * The Mann-Kendall (MK) trend test is a nonparametric test that evaluates whether there is a monotonic trend in a time-series dataset. We applied the MK trend test to smothed N/PMMoV data and used a 14-day lookback period from the last datapoint available. We interpreted positive values of the test statistic, tau, with p <= 0.005, p <= 0.05, and p <= 0.01 as upward, likely upward, and very likely upward trends, respectively. We interpreted negative tau values with p <= 0.005, p <= 0.05, and p <= 0.01 as downward, likely downward, and very likely downward trends, respectively. | |||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | |||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | |||
| Percent change in the last 14 days | |||
| Virus | Merced County | Stanislaus County | Yolo County |
|---|---|---|---|
| SARS-CoV-2 | Upward | Very likely downward | Very likely downward |
| Norovirus | No Trend | Very likely downward | Very likely downward |
| Rotavirus | Downward | Very likely downward | Very likely downward |
| Parainfluenza | NA | NA | NA |
| Enterovirus D68 | No Trend | No Trend | No Trend |
| Hepatitis A Virus | No Trend | No Trend | Very likely downward |
| Candida auris | No Trend | No Trend | No Trend |
| RSV | No Trend | No Trend | No Trend |
| HMPV | No Trend | Downward | No Trend |
| Influenza A | No Trend | No Trend | Very likely upward |
| Influenza B | No Trend | No Trend | Likely downward |
| Week 141: 06/23 - 07/06 | |||
| * The slope is calculated from a least-squares linear regression of log10-transformed values of the N/PMMoV data versus day. We used a 14-day look-back period to calculate the slope. For each slope estimate, we extracted the 90%, 95%, and 99% confidence intervals (CIs) to calculate the 90%, 95%, and 99% CIs for each PC estimate. We interpreted PC values greater than 0 for the 90%, 95%, and 99% upper CIs as upward, likely upward, and very likely upward trends, respectively. We interpreted PC values less than 0 for the 90%, 95%, and 99% lower CIs as downward, likely downward, and very likely downward trends day and previous n - 1 days. | |||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | |||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | |||
| The Relative Strength Index | |||
| Virus | Merced County | Stanislaus County | Yolo County |
|---|---|---|---|
| SARS-CoV-2 | No Trend | No Trend | No Trend |
| Norovirus | No Trend | No Trend | No Trend |
| Rotavirus | No Trend | Downward | Downward |
| Parainfluenza | NA | NA | NA |
| Enterovirus D68 | No Trend | Very likely upward | No Trend |
| Hepatitis A Virus | Downward | No Trend | No Trend |
| Candida auris | No Trend | No Trend | Very likely upward |
| RSV | Downward | Downward | No Trend |
| HMPV | No Trend | No Trend | No Trend |
| Influenza A | No Trend | No Trend | No Trend |
| Influenza B | No Trend | No Trend | No Trend |
| Week 141: 06/23 - 07/06 | |||
| * The Relative Strength Index (RSI) calculates a ratio of the recent upward price movements to the absolute price movement. Developed by J. Welles Wilder. | |||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | |||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | |||
| Percent change | ||||||||
| Virus | Merced County | Stanislaus County | Yolo County | |||||
|---|---|---|---|---|---|---|---|---|
| Merced | Los Banos | Modesto | Turlock | Davis | Esparto | Winters | Woodland | |
| SARS-CoV-2 | +17.1% | +22.4% | -66.4% | -60.6% | -44.5% | -37.8% | NA | +56.5% |
| Norovirus | -5.2% | +2.6% | -13.3% | -72% | -51.1% | -67.8% | NA | -16.9% |
| Rotavirus | -57% | -53% | -89.8% | -91.6% | -35.5% | NA | NA | +155% |
| Parainfluenza | NA | NA | NA | NA | NA | NA | NA | NA |
| Enterovirus D68 | Sporadic | ND | ND | ND | ND | NA | NA | ND |
| Hepatitis A Virus | ND | ND | ND | ND | ND | NA | NA | ND |
| Candida auris | ND | ND | ND | ND | ND | NA | NA | ND |
| RSV | ND | ND | ND | ND | ND | NA | NA | ND |
| HMPV | ND | ND | ND | ND | ND | NA | NA | ND |
| Influenza A | ND | ND | ND | ND | Sporadic | NA | NA | Sporadic |
| Influenza B | +69.4% | Sporadic | ND | ND | Sporadic | NA | NA | ND |
| Percent change is calculated here using the average of measurements over the past two weeks compared to the average of measurements from the prior two weeks. Results below the limit of detection are included in the averages as half the limit of detection. | ||||||||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | ||||||||
| NA: if the above criteria is not met and there were no data available in the last 7 days. | ||||||||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | ||||||||
| ND: Non-detect (i.e., below the limit of detection) if there were no detections in the last 14 days. | ||||||||
| +LL: increasing but at low levels. If the above criteria is met but there were no positive detections or no data in the prior 14 days. | ||||||||
| +Sharply: percent change is greater than 500%. | ||||||||
| Current wastewater level | ||||||||
| Virus | Merced County | Stanislaus County | Yolo County | |||||
|---|---|---|---|---|---|---|---|---|
| Merced | Los Banos | Modesto | Turlock | Davis | Esparto | Winters | Woodland | |
| SARS-CoV-2 | High | Medium | Medium | Medium | High | Low | Low | High |
| Norovirus | High | High | High | High | Medium | Low | Low | High |
| Rotavirus | Low | Medium | Low | Low | Medium | Low | Low | Medium |
| Parainfluenza | Low | Low | Low | Low | Low | Low | Low | Low |
| Enterovirus D68 | Low | Low | Low | Low | Low | Low | Low | Low |
| Hepatitis A Virus | Low | Low | Low | Low | Low | Low | Low | Low |
| Candida auris | Low | Low | Low | Low | Low | Low | Low | Low |
| RSV | Low | Low | Low | Low | Low | Low | Low | Low |
| HMPV | Low | Low | Low | Low | Low | Low | Low | Low |
| Influenza A | Low | Low | Low | Low | Low | Low | Low | Low |
| Influenza B | Low | Low | Low | Low | Low | Low | Low | Low |
| For non-seasonal pathogens, the boundaries of the low, medium, and high labels are defined as the tertiles of all data available for that pathogen within a given site or county. | ||||||||
| For seasonal pathogens, the boundaries of the low, medium, and high labels are defined as the thirds of the 95th percentile value for all of the data available for that pathogen within a given site or county. | ||||||||
| If there have not been at least one positive sample in the last 7 days and at least three positive samples in the last 14 days, a low categorization is assigned. | ||||||||
| Mann-Kendall trend test | ||||||||
| Virus | Merced County | Stanislaus County | Yolo County | |||||
|---|---|---|---|---|---|---|---|---|
| Merced | Los Banos | Modesto | Turlock | Davis | Esparto | Winters | Woodland | |
| SARS-CoV-2 | No Trend | Very likely upward | No Trend | Very likely downward | Very likely downward | Very likely downward | NA | Likely upward |
| Norovirus | No Trend | No Trend | Likely downward | Very likely downward | Likely downward | Very likely downward | NA | No Trend |
| Rotavirus | No Trend | No Trend | Very likely downward | Very likely downward | Very likely downward | NA | NA | No Trend |
| Parainfluenza | NA | NA | NA | NA | NA | NA | NA | NA |
| Enterovirus D68 | Sporadic | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Hepatitis A Virus | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Candida auris | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| RSV | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| HMPV | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Influenza A | Sporadic | No Trend | No Trend | Sporadic | Sporadic | NA | NA | Sporadic |
| Influenza B | No Trend | Sporadic | No Trend | Sporadic | Sporadic | NA | NA | No Trend |
| Week 141: 06/23 - 07/06 | ||||||||
| * The Mann-Kendall (MK) trend test is a nonparametric test that evaluates whether there is a monotonic trend in a time-series dataset. We applied the MK trend test to smothed N/PMMoV data and used a 14-day lookback period from the last datapoint available. We interpreted positive values of the test statistic, tau, with p <= 0.005, p <= 0.05, and p <= 0.01 as upward, likely upward, and very likely upward trends, respectively. We interpreted negative tau values with p <= 0.005, p <= 0.05, and p <= 0.01 as downward, likely downward, and very likely downward trends, respectively. | ||||||||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | ||||||||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | ||||||||
| Percent change in the last 14 days | ||||||||
| Virus | Merced County | Stanislaus County | Yolo County | |||||
|---|---|---|---|---|---|---|---|---|
| Merced | Los Banos | Modesto | Turlock | Davis | Esparto | Winters | Woodland | |
| SARS-CoV-2 | No Trend | Very likely upward | Very likely downward | Very likely downward | Very likely downward | Very likely downward | NA | Very likely upward |
| Norovirus | No Trend | No Trend | Likely downward | Very likely downward | Very likely downward | Very likely downward | NA | No Trend |
| Rotavirus | No Trend | Likely downward | Very likely downward | Very likely downward | Very likely downward | NA | NA | No Trend |
| Parainfluenza | NA | NA | NA | NA | NA | NA | NA | NA |
| Enterovirus D68 | Sporadic | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Hepatitis A Virus | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Candida auris | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| RSV | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| HMPV | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Influenza A | Sporadic | No Trend | No Trend | Sporadic | Sporadic | NA | NA | Sporadic |
| Influenza B | No Trend | Sporadic | No Trend | Sporadic | Sporadic | NA | NA | No Trend |
| Week 141: 06/23 - 07/06 | ||||||||
| * The slope is calculated from a least-squares linear regression of log10-transformed values of the N/PMMoV data versus day. We used a 14-day look-back period to calculate the slope. For each slope estimate, we extracted the 90%, 95%, and 99% confidence intervals (CIs) to calculate the 90%, 95%, and 99% CIs for each PC estimate. We interpreted PC values greater than 0 for the 90%, 95%, and 99% upper CIs as upward, likely upward, and very likely upward trends, respectively. We interpreted PC values less than 0 for the 90%, 95%, and 99% lower CIs as downward, likely downward, and very likely downward trends day and previous n - 1 days. | ||||||||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | ||||||||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | ||||||||
| The Relative Strength Index | ||||||||
| Virus | Merced County | Stanislaus County | Yolo County | |||||
|---|---|---|---|---|---|---|---|---|
| Merced | Los Banos | Modesto | Turlock | Davis | Esparto | Winters | Woodland | |
| SARS-CoV-2 | No Trend | No Trend | No Trend | No Trend | No Trend | No Trend | NA | No Trend |
| Norovirus | No Trend | No Trend | No Trend | No Trend | Downward | No Trend | NA | No Trend |
| Rotavirus | Downward | No Trend | Downward | No Trend | Downward | NA | NA | No Trend |
| Parainfluenza | NA | NA | NA | NA | NA | NA | NA | NA |
| Enterovirus D68 | Sporadic | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Hepatitis A Virus | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Candida auris | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| RSV | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| HMPV | No Trend | No Trend | No Trend | No Trend | No Trend | NA | NA | No Trend |
| Influenza A | Sporadic | No Trend | No Trend | Sporadic | Sporadic | NA | NA | Sporadic |
| Influenza B | No Trend | Sporadic | No Trend | Sporadic | Sporadic | NA | NA | No Trend |
| Week 141: 06/23 - 07/06 | ||||||||
| * The Relative Strength Index (RSI) calculates a ratio of the recent upward price movements to the absolute price movement. Developed by J. Welles Wilder. | ||||||||
| Criteria: need at least three positive detections in the last 14 days to report a percent change. | ||||||||
| Sporadic: Labeled as sporadic detections if the above criteria is not met, but there is at least 1 positive detection in the last 14 days. | ||||||||
Merced’s average SARS-CoV-2 concentrations (N/PMMoV) increased ⬆️ by 17.1% between the most recent two weeks and the two weeks prior to that. Los Banos’s average increased ⬆️ by 22.4%.
Merced’s average Influenza A concentrations (Flu A/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Los Banos’ average showed no detection.
Merced’s average Influenza B concentrations (Flu B/PMMoV) increased ⬆️ by 69.4% between the most recent two weeks and the two weeks prior to that. Los Banos’ average sporatic detection.
Merced’s average RSV concentrations (RSV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Los Banos’ average showed no detection.
Merced’s HMPV concentrations (HMPV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Los Banos’s average showed no detection.
Merced’s average Norovirus concentrations (Norovirus/PMMoV) decreased ⬇️ by 5.2% between the most recent two weeks and the two weeks prior to that. Los Banos’ average remained the same 🔄.
Merced’s average Hepatitis A Virus concentrations (HAV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Los Banos’ average showed no detection.
Merced’s average Rotavirus concentrations (Rotavirus/PMMoV) decreased ⬇️ by 57% between the most recent two weeks and the two weeks prior to that. Los Banos’ average decreased ⬇️ by 53%.
Merced’s average Enterovirus D68 concentrations (EV_D68/PMMoV) sporatic detection between the most recent two weeks and the two weeks prior to that. Los Banos’ average showed no detection.
Merced’s average Candida auris concentrations (C_auris/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Los Banos’ average showed no detection.
Merced’s average Parainfluenza concentrations (HPIV/PMMoV) No data available between the most recent two weeks and the two weeks prior to that. Los Banos’ average No data available.
Modesto’s average SARS-CoV-2 concentrations (N/PMMoV) decreased ⬇️ by 66.4% between the most recent two weeks and the two weeks prior to that. Turlock’s average decreased ⬇️ by 60.6%.
Modesto’s average Influenza A concentrations (Flu A/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Turlock’s average showed no detection.
Modesto’s average Influenza B concentrations (Flu B/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Turlock’s average showed no detection.
Modesto’s average RSV concentrations (RSV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Turlock’s average showed no detection.
Modesto’s average HMPV concentrations (HMPV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Turlock’s average showed no detection.
Modesto’s average Norovirus concentrations (Norovirus/PMMoV) decreased ⬇️ by 13.3% between the most recent two weeks and the two weeks prior to that. Turlock’s average decreased ⬇️ by 72%.
Modesto’s average Hepatitis A Virus concentrations (HAV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Turlock’s average showed no detection.
Modesto’s average Rotavirus concentrations (Rotavirus/PMMoV) decreased ⬇️ by 89.8% between the most recent two weeks and the two weeks prior to that. Turlock’s average decreased ⬇️ by 91.6%.
Modesto’s average Enterovirus D68 concentrations (EV_D68/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Turlock’s average showed no detection.
Modesto’s average Candida auris concentrations (C_auris/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Turlock’s average showed no detection.
Modesto’s average Parainfluenza concentrations (HPIV/PMMoV) No data available between the most recent two weeks and the two weeks prior to that. Turlock’s average No data available.
Davis’ average SARS-CoV-2 concentrations (N/PMMoV) decreased ⬇️ by 44.5% between the most recent two weeks and the two weeks prior to that. Esparto’s average decreased ⬇️ by 37.8%. Winters’ average No data available. Woodland’s average increased ⬆️ by 56.5%.
Davis’ average Influenza A concentrations (Flu A/PMMoV) sporatic detection between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average sporatic detection.
Davis’ average Influenza B concentrations (Flu B/PMMoV) sporatic detection between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average showed no detection.
Davis’ average RSV concentrations (RSV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average showed no detection.
Davis’ HMPV concentrations (HMPV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average showed no detection.
Davis’ Norovirus concentrations (Norovirus/PMMoV) decreased ⬇️ by 51.1% between the most recent two weeks and the two weeks prior to that. Esparto’s average decreased ⬇️ by 67.8%. Winters’ average No data available. Woodland’s average decreased ⬇️ by 16.9%.
Davis’ Hepatitis A Virus concentrations (HAV/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average showed no detection.
Davis’ Rotavirus concentrations (Rotavirus/PMMoV) decreased ⬇️ by 35.5% between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average increased ⬆️ by 155%.
Davis’ Enterovirus D68 concentrations (EV_D68/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average showed no detection.
Davis’ Candida auris concentrations (C_auris/PMMoV) showed no detection between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average showed no detection.
Davis’ Parainfluenza concentrations (HPIV/PMMoV) No data available between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average No data available.
Davis’ average Mpox concentrations (Mpox/PMMoV) No data available between the most recent two weeks and the two weeks prior to that. Esparto’s average No data available. Winters’ average No data available. Woodland’s average No data available. Merced’s average No data available. Los Banos’ average No data available. Modesto’s average No data available. Turlock’s average No data available https://healthycvtogether.org/monkeypox-data/