lead and copper 90th percentile calculator

Copper *AL. While ZipRecruiter is seeing annual salaries as high as $114,000 and as low as $20,500, the majority of Lead Advisor salaries currently range between $33,500 (25th percentile) to $65,500 (75th percentile) with top earners (90th percentile) making $84,000 annually across the United States. Sheet1 Sample # INSTRUCTIONS Sample Result (mg/L) (List non-detects as 0.) copper pipe. This is the first of three modules that will addresses the second area of statistical inference, which is hypothesis testing, in which a specific statement or hypothesis is generated about a population parameter, and sample statistics are used to assess the likelihood that the hypothesis is true. Determine the 90th percentile lead level by following the instructions given in Table 2. – Substantial change in water treatment. Agenda. Lead and Copper Tap Homeowner Sampling Procedures (PDF) Homeowners should leave faucet aerators in place prior to sampling. Dear JEA Water Customer, JEA is pleased to provide you with the 2017 Water Quality Report. Orlando sentinel garage sale ads 1 . § 141.80(c)(3) says, "The 90th percentile lead and copper levels shall be computed as follows: (i) The results of all lead and copper samples taken during a monitoring period shall be placed in ascending order from the sample with the lowest concentration to the sample with the highest concentration. Homes with a lead service line that connects the water main (located under the street) to your home’s internal plumbing. So if we assume an even distribution within the bracket, then its most likely that the person at 75% percentile is the one whose wealth is $263k. Welcome to the Department of Environmental Conservation. ... As a controversial copper windfall tax goes before Chile’s senate, debate is being stymied by huge differences in … Guidance. b. The list of the most helpful results for how to find the 90th percentile that is provided above may be of help for users. Lead: The 90th percentile value of the 45 homes sampled showed lead at the 14 ppb level. 90 th percentile value in 10 entries is a 9 th value which is 4, so just ignore S4 with 4.8 (keep it hungry for some days, it eats so much).. lead (ppb) 2017 15 0 3.5 ug/l 0.59 – 13.00 No Household plumbing and service connections copper (ppm) 2017 1.3 1.3 870 ug/l ND - 1500 No Household plumbing and service connections secondary substances (unit of measure) s M MclG aclmount detected range exceedance Karen A. Barnes, C. Richard Sinclair and D.H. Watson - Chemical Migration and Food Contact Materials (2007) This document provides a comprehensive summary of all the parameters found to be present in JEA drinking water during the most recent sampling period. Copper prices have never traded below the 90th percentile of production costs, the ANZ analysts noted, so their copper price forecast sees the downside protected near $4,000/t, with expected copper prices averaging $4,930/t in 2020 before rebounding to $6,040/t in 2021. That value is 98, and it’s the 90th percentile for this data set. LGA is a term describing a fetus or newborn that is estimated to be >90th percentile for weight at a particular gestational age. Compare Search ( Please select at least 2 keywords ) Most Searched Keywords. While ZipRecruiter is seeing salaries as high as $41,244 and as low as $18,331, the majority of Warehouse Lead salaries currently range between $25,829 (25th percentile) to $31,245 (75th percentile) with top earners (90th percentile) making $35,828 annually in El Paso. The Town of Dillon has exceeded the 90th percentile rule seven times in recent years … I am trying to classify my data in percentile buckets based on their values. The traditional and predominant focus of nutritional management for children with impaired kidney function is to prevent the development of PEM and meet the patient's vitamin and mineral needs. Why Study Statistics? 4. 3. 2. Open DOC file, 81 KB, for Lead and Copper 90th Percentile (LCR-E) (DOC 81 KB) For use by COM and NTNC. lead (ppb) 2017 15 0 3.5 ug/l 0.59 – 13.00 No Household plumbing and service connections Copper (ppm) 2017 1.3 1.3 870 ug/l ND - 1500 No Household plumbing and service connections secondary substances (unit of measure) sm mClg aCmount detected l range exceedance Regular evaluation of nutritional status and provision of adequate nutrition are key components in the overall management of children with CKD. Lead & Copper Monitoring Period 90th Percentile Range Unit AL Sites Over AL Typical Source Copper Free 2013 0.18 0.0088-0.23 ppm 1.3 0 Corrosion of household plumbing Lead 2013 2 1-3.9 ppb 15 0 Corrosion of household plumbing Homes with a lead service line that connects the water main (located under the street) to your home’s internal plumbing. LCR 90th Percentile Calculator - This MS Excel spreadsheet can be used to calculate 90th Percentile values used to determine the action levels for both Lead (Pb) and Copper (Cu) by the linear interpolation method. i.e. Although there is no detectable lead in our source water, tests show there are sometimes elevated levels of lead and copper in some samples, primarily because of corrosion of household plumbing systems. This is the equivalent of $955/week or $4,137/month The average Head Athletic Trainer salary in the United States is $47,762 as of April 27, 2021, but the salary range typically falls between $42,583 and $53,852. 3) Determine the 90th percentile lead … 32 samples were collected. E. x. c. e. e. d. a. n. ce. With good medical care and education to help control blood sugar levels, however, you can significantly reduce your risk of long-term problems from diabetes. Percentile Calculator. For systems on their first lead and/or copper exceedance, the option exists to conduct 2 consecutive 6-month monitoring periods with 90th percentile values below both the lead and copper action levels to avoid immediate treatment installation. The ginger herb can be added raw in food or used in its powder form to brew tea. Inside, you’ll find detailed information on the quality of the water JEA provides to more than 337,000 water customers each day, and the steps we’re taking to protect and preserve this precious, life-sustaining resource for future generations. This presentation will go over: LCRR Background; Summarize the Major LCR Revisions It also clarifies the calculation of lead 90th percentile for compliance. Job title pay scale 4 . This is called the 90th percentile rule. Enter your data into the text box below, specify the percentile you want to calculate, and then hit the "Calculate Percentile" button. Online 90th Percentile calculator. Lead has the potential to be emitted from the smelting processes in gaseous and particulate form. 2. A conservative estimate of metal solubility in the representative material(s), for example, the 90th percentile (P90) value, can subsequently be used for the hazard assessment of the complex inorganic materials group. So if you have ideas, articles, news, questions, comments we would love to hear from you. The distribution of Tl concentrations in soils was characterized by a median value of 0.29 mg Tl kg(-1) and a 90th percentile value of 1.54 mg Tl kg(-1). Lead service lines can also be found in older homes. Homes with copper pipe and lead solder installed between 1982 and 1987. This memo reiterates and clarifies elements of the LCR associated with the collection of samples. is. Determine the 90th percentile Lead and Copper Levels: 1. COVID-19: Offices of the Utah Department of Environmental Quality are open.In an effort to reduce the spread of COVID-19, we are limiting person-to-person contact. Title: LCRR Webinar Series Part 1: Overview of LCRR Date: June 8, 2021 Time: 12:00 - 1:15 pm Price: Free Speakers: David Rowley, PE, City of Rochester & Stephen Waldvogel, PE, GHD. The following instructions (taken from Chapter 246-290-025 WAC, 40 CFR Section 141.80) are written using lead as the example, but they apply in the same way to copper results. Feb 2019 Open PDF file, 214.29 KB, for Instructions for Lead and Copper Sampling Plan Forms LCR-SP-A, LCR-SP-B, LCR-SP-C (PDF 214.29 KB) For use by COM and NTNC. Jamaica rjr online radio 3 . Frequently asked questions (FAQ). In 1991, the EPA passed the Lead and Copper Rule requiring public water systems to test for lead and copper at the taps in How To Find The 90th Percentile Overview. In fact, taking calcium supplements when your body doesn't need the extra calcium can lead to hypercalcemia, which can cause constipation, nausea, vomiting and confusion, according to Harvard Medical School. For systems required to collect 5 samples. 90th Percentile Calculator: The following external link was created by the state of Colorado and is an easy to use tool for operators to calculate the 90th percentile for compliance with the Lead & Copper Rule. Clarification of Requirements for Collecting Samples and Calculating Compliance (PDF) Where samples need to be collected, whether customer requested samples are counted in the 90 th percentile compliance value, and how the 90 th percentile … Lead enters into home tap water through old lead service pipes and lead-containing plumbing. BCWS has been in compliance with the Lead and Copper Rule for all previous rounds of monitoring. While ZipRecruiter is seeing salaries as high as $41,244 and as low as $18,331, the majority of Warehouse Lead salaries currently range between $25,829 (25th percentile) to $31,245 (75th percentile) with top earners (90th percentile) making $35,828 annually in El Paso. 3. The concentration of that sample is the 90th percentile. LCR Overview Action Level Exceedance Corrosion Control Treatment Steps. Schroeder seniors place at the 92nd percentile on Major Field Test. Copper saw a 12% plunge in March, after two months of lockdowns in China, but began rallying without pause from April as the No. Beyond The Lead Sample Site Plan. Calculating 90th percentile for lead. Additionally, Attorney III requires a Juris Doctor degree from an accredited law school. Lead and Copper Date Sampled MCLG Action Level (AL) 90th Percentile # Sites Over AL Units Violation Likely Source of Contamination Copper 07/192017 1.3 1.3 0.566 0 ppm N Erosion of natural deposits; Leaching from wood preservatives; Corrosion of household plumbing systems. This 90th percentile background value should be used in conjunction with the plant effluent data to evaluate reasonable potential to cause a violation of the criteria for aquatic life protection and derive effluent limits. Lead and Copper Proposed Lead Rules • Requires a new or updated corrosion control treatment study and plan not later than 18 months after: – Change or addition of source. The HealthPages.org website is for you—it's Health Information You Can Use! China's October copper imports fell 18.7 percent from September to 423,000 tonnes, while those for the Jan-Oct period rose 17 percent year on year to 4.41 million tonnes. There were minor revision to this rule in 2000 and 2007. We are here to serve you, and in an effort to reduce the risk of contracting and/or transmitting the coronavirus (COVID-19, MWD is asking customers to use our many online and telephone options rather than doing business in person. Below is the syntax for percentile "=PERCENTILE (array, k)" The array is the data values. These are the ways applied by many people. The most recent sampling was in 2008. The 90th percentile is automatically calculated in our database, so you do not need to send your calculations to us. [40 CFR 141.80(c)(l)] ("Samples collected at sites not meeting the targeting criteria may not be used in calculating the 90th percentile lead and copper levels." Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at epa.gov/safewater/lead. Conserving, improving, and protecting Alaska's natural resources and environment to enhance the health, safety, and economic and social well-being of Alaskans. Bears will point to 90th percentile cash costs for miners of just $5,000. printablechartdiabetes symptoms in women. Lead and Copper Consumer Notice Letter Template for Community Systems; Sampling Location Change; How to Calculate 90th Percentile Values; Lead and Copper Site Sampling Plan; 90th Percentile Calculator (EXTERNAL LINK) Currently, the spatial distribution of soil lead concentrations in the Melbourne metropolitan area is unknown. 90 th percentile value in 10 entries is a 9 th value which is 4, so just ignore S4 with 4.8 (keep it hungry for some days, it eats so much).. That uncertainty means 2021 could be a year of significant price volatility.” Like Smith of Commodity Market Analytics, CRU’s Durant is also banking on China to outpace growth projections, and spark another 2020-like phenomenon in copper prices. Sampling will be conducted again this summer. ++ 90th Percentile: i.e., 90 percent of the samples were less than the values shown. This simple tool will calculate the k th percentile of a set of numbers, where k is any integer between 1 and 100.. I also understand that providing answers to questions on this exam to other students is academic misconduct as is taking or receiving answers to questions on this exam from other students. The person at the 90th is probably much higher. What's more, excessive calcium supplementation may put you at increased risk for kidney and heart disease as well as prostate cancer. Drivers license change of address form 2 . Steps in finding the 90th percentile on Excel. The average Buyer IV salary in Rochester, NY is $102,760 as of October 28, 2020, but the range typically falls between $92,175 and $115,162.Salary ranges can vary widely depending on many important factors, including education, certifications, additional skills, the number of years you have spent in your profession. 4% of the homes sampled were above the action level with a range of < 2 to 27 ppb lead. Nitrate greater than or equal to 10.0 mg/L or Nitrite greater than or equal to 1.0 mg/L. Over time, this will lead to insulin resistance, where your cells will fail to respond to insulin. How to Calculate the 90th Percentile Lead and Copper Levels 1) List all lead and copper sample results in the table provided on the attached "Lead and Copper Results Worksheet". U.S. EPA 2011, Table 16-28; weighted average of 90th percentile time spent bathing (birth to <6 years) U.S. EPA 2011, Tables 16-30 and 16-31; weighted average of adult (21 to 78) 90th percentile of time spent bathing/ showering in a day, divided by mean number of … Identify the 29th sample in your list of ordered samples (ordered from lowest to highest). A PWS has exceeded the action level if the 90th percentile for lead is > 0.015 mg/L or copper is > 1.3 mg/L. Neither lead nor copper are typically found in source waters, but can get into water by way of internal corrosion of household plumbing. Inside, you’ll find detailed information on the quality of the water JEA provides to more than 337,000 water customers each day, and the steps we’re taking to protect and preserve this precious, life-sustaining resource for future generations. Lead and Copper Rule 90th percentile lead in drinking water sampling results. Regulatory History - 1. The conclusion is 90% of total sheep either eat 4 KGs grass or below, so you got an upper limit of grass consumption. Rev. Experts suggest the best way to manage stress is to exercise or meditate regularly.But, supplements like ginseng, fenugreek, and vitamin D have been shown to lower blood glucose levels. Please contact DEQ here to conduct business. The national average salary for an employee at Kennecott Utah Copper is $68,153 per year, or $32.77 an hour. The 90th percentile for lead at Anytown Middle School was 43.8 micrograms per liter (µg/L), which means 90% ofthe samples collected had lead levels below 43.8 g/L. Question 1: How many samples do you have? Jul. Example 1 th- Calculating Lead 90 Percentile Value: 10 samples x 0.9 = 9; the 9th sample is the 90th percentile value for the entire sample set The 90th percentile is 18.6 µg/L The 90th percentile is > Action Level Inform consumers of the health risks associated with lead in drinking water If the 90th percentile lead or copper concentration exceeds an action level (lead 90th% being 0.0155 mg/L = 15.5 µg/L or more, or copper 90th% being 1.35 mg/L = 1350 µg/L or more), then one or more of public education, water quality parameter and lead and copper … Materials evaluation and sample pool guidance. Subjects: All European and Asian live births, stillbirths, and late fetal losses from 22 to 32 weeks' gestation, excluding those with major congenital malformations, in women resident in the Trent health region between 1 January 1994 and 31 … Get online GRE prep study material, GRE Prep Club helps you with GRE test preparation to improve GRE score. 26518 (June 7,1991)). Drinking water lead and copper 90th percentile calculator Lead and Copper Rule Forms and Guidance. BCWS has been in compliance with the Lead and Copper Rule for all previous rounds of monitoring. Circle the highest three values for both lead and copper. Lead and copper enter drinking water primarily through plumbing materials. (Only 10% of the samples have higher lead or copper values) For 5 samples, 90th Percentile Level is the average of 4th and 5th highest samples. That uncertainty means 2021 could be a year of significant price volatility.” Like Smith of Commodity Market Analytics, CRU’s Durant is also banking on China to outpace growth projections, and spark another 2020-like phenomenon in copper prices. The 90 th percentile of a dataset is the value that cuts off the first 90 percent of the data values when all of the values are sorted from least to greatest. "How do I calculate the 90th percentile value to report the results of my lead and copper distribution samples?" The Attorney III work is generally independent and collaborative in nature. One of the most commonly used percentiles is the 50th percentile, which represents the median value of a dataset: this is the … Everett’s source water contains virtually no lead and Everett has eliminated lead … Additionally, accounting majors placed at the 99th percentile on the accounting portion of the exam. The state of Montana is currently working on our own adaptation of the tool, but in the meantime please use the above link. Design: Retrospective population based study. That uncertainty means 2021 could be a year of significant price volatility.” Like Smith of Commodity Market Analytics, CRU’s Durant is also banking on China to outpace growth projections, and spark another 2020-like phenomenon in copper prices. Bears will point to 90th percentile cash costs for miners of just $5,000. That uncertainty means 2021 could be a year of significant price volatility.” Like Smith of Commodity Market Analytics, CRU’s Durant is also banking on China to outpace growth projections, and spark another 2020-like phenomenon in copper prices. Per the federal Lead and Copper Rule, Tacoma Water collects lead and copper samples from customer homes every three years. – Operation outside of acceptable ranges for lead, copper, pH or other corrosion indicators. In our community, some of the pipes that connect older homes, those built prior to 1960, to the utility water main are made from lead. Smelting process emissions can occur from the INCO flash furnace, the converters, and the anode furnaces. 'K' is any number which represents the nth percentile. The concentration of lead for the 29th sample is the 90th percentile Just in case you need a simple salary calculator, that works out to be approximately $23.87 an hour. The highest level found in the 108 homes tested was 8 parts per billion. Rev. Samples Lead Result (mg/L) AL = .015 mg/L Copper Result (mg/L) AL = 1.3 mg/L; Dual Sample Setting: Trent health region. Bears will point to 90th percentile cash costs for miners of just $5,000. 2) Circle the highest three values for both lead and copper. Lead 07/192017 0 … Copper is widely used in power and construction and viewed by investors as a gauge of economic health. WWW. Rather 40 C.F.R. Once sorted, the value displayed above is the 90th percentile. When the 90 th percentile lead level exceeds the Lead Action Level, the PWS is required to notify the public and perform other corrective actions. LCR Monitoring. 190th Percentile Level = Concentration in the sample with sequence number yielded by 0.9 x number of samples. If more than 10 percent of locations tested contain lead higher than the action level, the water provider is out of compliance with lead regulation. Compliance for residential tap monitoring is calculated by comparing the 90th percentile sample of all the samples collected during each monitoring round with the EPA action levels. The following instructions (taken from Chapter 246-290-025 WAC, 40 CFR Section 141.80) are written using lead as the example, but they apply in the same way to copper results. How much does a Buyer IV make in Rochester, NY? Here is an example: 1. Nebraska Department of Environment and Energy, 245 Fallbrook Blvd, P.O. Lead: The 90th percentile value of the 45 homes sampled showed lead at the 14 ppb level. The most recent sampling was in 2008. Author: Angela Unrein Last modified by: Sahara Small Created Date: 7/30/2015 7:27:12 PM Other titles: Sheet1 Sheet2 Sheet3 Company: The total of search results for how to find the 90th percentile now is 20 with the latest update on 27th September 2020. What are the implications for my water utility? Chemist. Table 2 shows some of the common general indicators. Register now to know about GRE English free test and more. Another study found in the European Journal of Pharmacology showed that the ginger extract spissum could lower blood glucose levels and increase insulin levels simultaneously. Rounded Interpolated 2) Beginning with the cell corresponding to Sample # 1, enter sample results in any order. Review of the 90th percentile records is the method EPA developed to determine whether or not the lead and copper levels present a … Adding or updating sample sites on portal. I understand that the use of a calculator or communication device on this exam is academic misconduct. Excel operations involving percentile are very straightforward. However, you MUST still: complete a CCT Recommendation using the available options J K Bunderson P.E. Objective: To produce current data on survival of preterm infants. The stress that is inherent among first responders may lead to overeat-ing, tobacco use, abuse of alcohol, or use of drugs as a coping mechanism. Bears will point to 90th percentile cash costs for miners of just $5,000. That uncertainty means 2021 could be a year of significant price volatility.” Like Smith of Commodity Market Analytics, CRU’s Durant is also banking on China to outpace growth projections, and spark another 2020-like phenomenon in copper prices. All compliance samples used to determine the 90th percentile must come from that sampling pool. You'd even be able to see how well students in each percentile performed, making this a good graph to … 4. For example, the 90th percentile of a dataset is the value that cuts of the bottom 90% of the data values from the top 10% of data values. Appliances When installing new appliances like dishwashers, steam ovens and coffee machines, you may need to know the hardness, pH, or other information about your water. As we age, those deposits can build up and lead to a stiffening of the valve, a condition called stenosis. 90th | 90th century | 90th birthday | 90th to mh | 90th birthday coin | 90th sustainment bde | 90th percentile excel | 90th birthday party invitations | 90th bi May lead and direct the work of others. In 1991, the LCR rule was promulgated. Which of the following is NOT and indicator of dehydration: high urine specific gravity high cholesterol high BUN high hematocrit: 39. 32 x 0.9 = 28.8. Now say you want to find the 20th percentile. That means your Running Test performance was faster than 45% of the men in your reference age-group who took the test. In turn, this has a ... than the 30th percentile from the Cooper age and gender norms. Over time, the flow of blood through the aortic valve can leave tiny calcium deposits around the valve. The levels of these contaminants for contaminants that affect health along with their monitoring and are not expected to vary significantly from year to year. Lead is an impurity that is naturally occurring in the copper ore that is mined and in the copper concentrate that is produced. The pH value is also considered a general water quality indicator. 'ulqnlqj :dwhu 6hfwlrq &dofxodwh wkh /hdg wk 3hufhqwloh vdpsohv froohfwhg 2ughu dqg 5dqn /hdg uhvxowv iurp orzhvw wr kljkhvw 5dqn ±6lwh ± pj / copper pipe. China's copper imports fell 18.7 percent from a month ago to 423,000 tonnes in October, while those for the Jan-Oct period rose 17 percent to 4.41 million tonnes from the same period last year. t. a violation. a. The copper action level is exceeded if the concentration in more than 10% of samples is greater than 1.3 mg/L (i.e. Hey Kelly, is this okay to use for my dog? These values are a range of all results from the 10th to the 90th percentile unless stated otherwise. The LCR addresses corrosion of lead and copper in drinking water primarily from service lines and household plumbing. Video tutorial. ... zinc, tin, lead and copper in Latin America and ranks among the top five in the world. Copper is widely used in power and construction and seen by investors as a gauge of economic health. When corrosion control measures fail (such as the recent crisis in Flint, Michigan), lead leaches into drinking water, and can reach toxic levels. Lead or Copper 90th Percentile Action Level When the action level is exceeded at .015 miligrams per liter (mg/L) for lead and/or 1.3 mg/L for copper is exceeded, the water system triggers a series of treatment techniques called "the Corrosion Control Treatment Steps" and public water systems must: COVID-19: Offices of the Utah Department of Environmental Quality are open.In an effort to reduce the spread of COVID-19, we are limiting person-to-person contact. Pb and Cu enter drinking water mainly from corrosion of Pb and Cu containing plumbing materials. TTHM [Total Trihalomethanes]: The following samples during 2018 exceeded the TTHM MCL of 80 ppb. 7. or 1.350 mg/L (1350 ug/L) for Copper, contact your Ohio EPA District Inspector immediately to discuss what steps your water system needs to do. Leaded solder was used up to 1986. Erratic blood sugar is a common problem nowadays and a lot of ... levels. Protecting and Preserving our Water. 56 Fed Reg. Exposure to lead and copper may cause health problems ranging from stomach distress to brain damage. Call 303-692-3308 for the following high results (potential acute situations): Positive coliform or Positive E. coli. Fitness Norms or Normative Data: A representation of how individuals compare to one --WWW.CEE.ORG. Lead. Circle the highest three values for both lead and copper. 4% of the homes sampled were above the action level with a range of < 2 to 27 ppb lead. drop in length percentile drop in weight percentile increase in length percentile first two selections only: 38. "How do I calculate the 90th percentile value to report the results of my lead and copper distribution samples?" Planet Ayurveda; |One of the two foremost types of diabetes, the type in which the beta cells of the pancreas generate insulin but the body is unable to use it efficiently because the cells of the body are resistant to the action of insulin. 1986 Safe Drinking Water Act Lead Ban Required only lead-free materials be … Bears will point to 90th percentile cash costs for miners of just $5,000. If the 90th percentile copper level is greater than 1.3 mg/L, you have exceeded the action level. At 45 sites with full LSLs, 90th percentile lead levels in standing samples ranged from 16.4 to 44.5 µg L(-1) (L1 and L4, respectively). Modern Statistics Statistics and Engineering The Role of the Scientist and Engineer in Quality Improvement A Case Study : Visually Inspecting Data to Improve Product Quality Two Basic Concepts - Population and Sample Treatment Lead concentration (mg/kg) of surface soil (0–2 cm) samples collected along three transects oriented across the Melbourne metropolitan area (<250 μm grain size). Uncontrolled diabetes can lead to serious complications such as heart disease, stroke, blindness, and kidney failure. High or low pHs can indicate how corrosive water is. the 90th percentile copper level is greater than 1.3 mg/L). CORONAVIRUS (COVID-19) SAFETY: Your drinking water is safe and reliable.The health and safety of our customers and employees are top priority. 4/25/18. Requires admittance to a state bar. The Mayo Clinic says this condition is most prevalent in people age 65 and older, with symptoms often not appearing until age 70. 90th Percentile Calculator: The following external link was created by the state of Colorado and is an easy to use tool for operators to calculate the 90th percentile for compliance with the Lead & Copper Rule; The state of Montana is currently working on our own adaptation of the tool, but in the meantime please use the above link. This calculator is for your use.

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