Non-Transient Non-Community · PWSID IL3037705

Grand Prairie Transit

Serves 160 peopleGroundwaterOwner: PrivateLockport, Illinois
Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2001: 170 violations. 1 treatment lapse · 165 missed or late tests · 4 notices or reports. Most recent began 2025-04-05.

None of them is a measurement of contaminated water.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

0Over the limit
1Treatment lapse
165Missed or late test1 open
4Notice or report

More violations on record than 99% of active water systems in Illinois. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2001 · Missed or late test: 120052007 · Missed or late test: 1201020152017 · Missed or late test: 232017 · Missed or late test: 232017 · Missed or late test: 232017 · Missed or late test: 232017 · Missed or late test: 232018 · Missed or late test: 212018 · Missed or late test: 212018 · Missed or late test: 212018 · Missed or late test: 212018 · Missed or late test: 212020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 532020 · Missed or late test: 5320202021 · Missed or late test: 222021 · Missed or late test: 222021 · Missed or late test: 222021 · Missed or late test: 222021 · Missed or late test: 222022 · Missed or late test: 222022 · Missed or late test: 222022 · Missed or late test: 222022 · Missed or late test: 222022 · Missed or late test: 222023 · Notice or report: 22024 · Treatment lapse: 12024 · Missed or late test: 222024 · Missed or late test: 222024 · Missed or late test: 222024 · Missed or late test: 222024 · Missed or late test: 222024 · Notice or report: 12025 · Notice or report: 12025
One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
<1% treatment lapse · 197% missed or late test · 1652% notice or report · 4

Across Illinois, 81% of violations are missed or late tests and 3% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 2 results on file · action level 15 ppb

2 ppb
1 ppb

Open now (1)

  1. 2024-08-13E. ColiMonitoring, Source Water (GWR)Open

Every violation on record

  1. 2025-04-05Public NoticePN Violation for NPDWR ViolationBack in compliance
  2. 2024-10-17Lead service line inventoryTTBack in compliance
  3. 2024-10-17Lead service line inventoryRPTBack in compliance
  4. 2024-08-13E. ColiMonitoring, Source Water (GWR)Open
  5. 2024-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2024-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2024-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2024-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2024-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2024-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2024-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2024-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2024-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2024-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2024-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2024-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2024-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2024-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2024-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2024-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2024-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2024-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2024-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2024-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2024-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 144 entries
  1. 2023-02-24Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  2. 2022-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  3. 2022-01-01StyreneMonitoring, RegularBack in compliance
  4. 2022-01-01EthylbenzeneMonitoring, RegularBack in compliance
  5. 2022-01-01TolueneMonitoring, RegularBack in compliance
  6. 2022-01-01BenzeneMonitoring, RegularBack in compliance
  7. 2022-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  8. 2022-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  9. 2022-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  10. 2022-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  11. 2022-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  12. 2022-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  13. 2022-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  14. 2022-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  15. 2022-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  16. 2022-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  17. 2022-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  18. 2022-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  19. 2022-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  20. 2022-01-01DichloromethaneMonitoring, RegularBack in compliance
  21. 2022-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  22. 2022-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  23. 2022-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  24. 2021-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  25. 2021-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2021-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2021-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2021-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2021-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2021-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  31. 2021-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  32. 2021-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2021-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  34. 2021-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  35. 2021-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  36. 2021-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  37. 2021-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  38. 2021-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  39. 2021-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  40. 2021-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  41. 2021-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  42. 2021-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  43. 2021-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  44. 2021-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  45. 2021-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  46. 2020-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  47. 2020-01-01SeleniumMonitoring, RegularBack in compliance
  48. 2020-01-01Thallium, TotalMonitoring, RegularBack in compliance
  49. 2020-01-01Beryllium, TotalMonitoring, RegularBack in compliance
  50. 2020-01-01Antimony, TotalMonitoring, RegularBack in compliance
  51. 2020-01-01MercuryMonitoring, RegularBack in compliance
  52. 2020-01-01CyanideMonitoring, RegularBack in compliance
  53. 2020-01-01ChromiumMonitoring, RegularBack in compliance
  54. 2020-01-01CadmiumMonitoring, RegularBack in compliance
  55. 2020-01-01BariumMonitoring, RegularBack in compliance
  56. 2020-01-01ArsenicMonitoring, RegularBack in compliance
  57. 2020-01-01ChlordaneMonitoring, RegularBack in compliance
  58. 2020-01-01Ethylene DibromideMonitoring, RegularBack in compliance
  59. 2020-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularBack in compliance
  60. 2020-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
  61. 2020-01-01PentachlorophenolMonitoring, RegularBack in compliance
  62. 2020-01-012, 4, 5-TpMonitoring, RegularBack in compliance
  63. 2020-01-012, 4-DMonitoring, RegularBack in compliance
  64. 2020-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  65. 2020-01-01HeptachlorMonitoring, RegularBack in compliance
  66. 2020-01-01LassoMonitoring, RegularBack in compliance
  67. 2020-01-01AtrazineMonitoring, RegularBack in compliance
  68. 2020-01-01CarbofuranMonitoring, RegularBack in compliance
  69. 2020-01-01PicloramMonitoring, RegularBack in compliance
  70. 2020-01-01SimazineMonitoring, RegularBack in compliance
  71. 2020-01-01OxamylMonitoring, RegularBack in compliance
  72. 2020-01-01GlyphosateMonitoring, RegularBack in compliance
  73. 2020-01-01EndothallMonitoring, RegularBack in compliance
  74. 2020-01-01DiquatMonitoring, RegularBack in compliance
  75. 2020-01-01ToxapheneMonitoring, RegularBack in compliance
  76. 2020-01-01MethoxychlorMonitoring, RegularBack in compliance
  77. 2020-01-01Bhc-GammaMonitoring, RegularBack in compliance
  78. 2020-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  79. 2020-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  80. 2020-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  81. 2020-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  82. 2020-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  83. 2020-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  84. 2020-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  85. 2020-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  86. 2020-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  87. 2020-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  88. 2020-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  89. 2020-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  90. 2020-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  91. 2020-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  92. 2020-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  93. 2020-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  94. 2020-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  95. 2020-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  96. 2020-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  97. 2020-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  98. 2020-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  99. 2018-01-01StyreneMonitoring, RegularBack in compliance
  100. 2018-01-01EthylbenzeneMonitoring, RegularBack in compliance
  101. 2018-01-01TolueneMonitoring, RegularBack in compliance
  102. 2018-01-01BenzeneMonitoring, RegularBack in compliance
  103. 2018-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  104. 2018-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  105. 2018-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  106. 2018-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  107. 2018-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  108. 2018-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  109. 2018-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  110. 2018-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  111. 2018-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  112. 2018-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  113. 2018-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  114. 2018-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  115. 2018-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  116. 2018-01-01DichloromethaneMonitoring, RegularBack in compliance
  117. 2018-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  118. 2018-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  119. 2018-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  120. 2017-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  121. 2017-01-01NitriteMonitoring, RegularBack in compliance
  122. 2017-01-01StyreneMonitoring, RegularBack in compliance
  123. 2017-01-01EthylbenzeneMonitoring, RegularBack in compliance
  124. 2017-01-01TolueneMonitoring, RegularBack in compliance
  125. 2017-01-01BenzeneMonitoring, RegularBack in compliance
  126. 2017-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  127. 2017-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  128. 2017-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  129. 2017-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  130. 2017-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  131. 2017-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  132. 2017-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  133. 2017-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  134. 2017-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  135. 2017-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  136. 2017-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  137. 2017-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  138. 2017-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  139. 2017-01-01DichloromethaneMonitoring, RegularBack in compliance
  140. 2017-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  141. 2017-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  142. 2017-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  143. 2007-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  144. 2001-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served160
Service connections1
Water sourceGroundwater
System typeNon-Transient Non-Community
OwnerPrivate
StatusActive
CityLockport
EPA ZIP on file60441

Areas served

  • Will County

Reading this record

Grand Prairie Transit is a non-transient non-community that draws from groundwater and serves about 160 people in Lockport, Illinois. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.